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1、 阅读下面课外短文,在空白处填入1个适当的单词或括号内单词的正确形式。
China's newest type of carrier rocket, the Long March 12, (make) its maiden flight on Saturday night, also marked the debut mission of the Hainan International Commercial Aerospace Launch Center.
Four liquid oxygen-kerosene engines on the rocket's first stage roared with dazzling flame at 10:25 pm. After flying a short while, two satellites separated from the rocket entered their preset orbit, marking the success of launch mission.
The Long March 12 is the first Chinese rocket with a diameter of 3.8 meters. By (compare), most Chinese rockets have a diameter of 3.35 meters, a standard (wide) that was set in the 1960s considering constraining factors in rail transport. Standing 62.6 meters tall, equivalent to the height of 22 (story) of a standard residential building, the two-stage model is the second (high) in all Chinese rockets, only exceeded by the 62.8-meter Long March 5.
The new model will (effective) improve China's capability (send) spacecraft to a sun-synchronous orbit and deploy satellite networks in low orbits, the Shanghai academy noted, adding that its research and development started in May 2020 and finished in June this year.
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2、 阅读下面短文,从每题所给的A、B、C、D四个选项中选出可以填入空白处的最佳选项。
I was at the grocery shop1 last-minute items for Easter dinner when I 2 from the corner of my eye the most wonderful flower I had ever seen. It was, as I later learned, a peony (牡丹).
I was so3 that I was going to buy myself flowers. I'd4 done this before. On the way home, I wondered why I had never really been5 to any flowers before.6 , I'd been on this earth for over half a century.
7 in England, my immigrant (移民) family viewed flowers as 8 since survival was our priority. Dad worked on the railways, and Mom, before her 9 , worked in a factory. Our small garden was filled with vegetables10 flowers, as Mom and Dad often said, "These will keep us alive if we can't get them from the 11 ."
We also built an underground oven (烤炉), where Mom and Dad would make flatbread (薄面饼). The smell of this flatbread12 us and anchored (使扎根) us to our lives in England. When Mother's Day came, Mom would say, "Why waste money on flowers? They'll just die. Buy shoes or coats instead." So, we kids made food for her at home. My mother 13 years ago after a long illness. If she were still alive today, she' d probably 14 her head at me for buying flowers.15 , I still wish I'd had the chance to show her this beautiful flower and buy it for her on Mother's Day
(1)A 、 holding up B 、 picking up C 、 turning up D 、 giving up(2)A 、 spotted B 、 examined C 、 predicted D 、 expected(3)A 、 shocked B 、 pleased C 、 embarrassed D 、 confused(4)A 、 always B 、 frequently C 、 never D 、 occasionally(5)A 、 used B 、 adapted C 、 introduced D 、 drawn(6)A 、 After all B 、 Above all C 、 In fact D 、 By contrast(7)A 、 Breaking down B 、 Growing up C 、 Breaking away D 、 Moving up(8)A 、 unfamiliar B 、 uncommon C 、 unnecessary D 、 unattractive(9)A 、 retirement B 、 illness C 、 promotion D 、 accident(10)A 、 in favor of B 、 in contrast to C 、 along with D 、 instead of(11)A 、 shop B 、 garden C 、 forest D 、 farm(12)A 、 alerted B 、 attracted C 、 comforted D 、 challenged(13)A 、 pulled through B 、 passed away C 、 gave up D 、 stepped aside(14)A 、 scratch B 、 nod C 、 shake D 、 raise(15)A 、 However B 、 Therefore C 、 Moreover D 、 Meanwhile -
3、 阅读下面短文,从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。
The easiest way to love yourself is to treat yourself like your own BFF (Best Friend Forever). Quite simply, this means you need to recognize your own self-worth and live your own life as honestly as you can. Read on to learn some strategies so you can embark on a journey of loving yourself.
Negative thoughts often come from outside people whose opinions we value and from whom we seek love and acceptance. Trace down the core of those negative thoughts and tell yourself a different story. Think about what you would say to a close friend who said those things about themselves.
Accept your flaws as part of who you are. Everything you've done and everywhere you've been is a part of who you are. Instead, accept that they're all parts of the same whole. When you love yourself, you love all of you because you wouldn't have the good without the bad.
Focus on your effort rather than the result to control perfectionism. If you expect yourself to be perfect for ever, you'll never be pleased with anything you produce. Try to appreciate the work you put into completing a task, rather than looking for flaws in what you done.
Practice gratitude for good things. Its human nature to see negative things as bigger and more important than positive things, but this also does tremendous damage to your self-esteem. When you find yourself focusing on negative or less favorable events in your life, immediately try to name 3 to 5 things that you can be grateful for.
A. This can lead to low self-esteem.
B. Pay attention to negative thoughts.
C. Let go of negative thoughts about yourself.
D. Self-love isn't about fixing all the "bad" things about yourself.
E. Look for the positive side even when bad things happen to you.
F. Usually, it might seem like it's easier to love others than to love yourself.
G. Actually, it's tough to build healthy relationships if you don't love yourself first.
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4、 阅读理解
Writing out the same word again and again may bring back bad memories for some, but handwriting can boost connectivity across brain regions, some of which are involved in learning and memory, a new study shows.
In the study, psychologists Audrey and Ruud, both at the Norwegian University of Science and Technology, stuck electrodes (电极) on the participants' heads. They asked the participants to type out or hand write with a digital pen words that appeared on a computer screen. Sensors in a cap recorded electrical brain activity. Then the psychologists looked for when two brain areas are active with the same frequency of electrical waves at the same time. This result can reveal the connectivity among different regions across the brain.
With handwriting, the researchers saw increased activity, specifically in low frequency bands, not only in the expected motor areas but also in others associated with learning. These low frequency bands have previously been shown to support memory processes. When the team compared the two tasks, they realized that handwriting —but not typing —increased the connectivity across parietal (顶叶) brain regions, which are involved in sensory and motor processing, and central regions, many of which are involved in memory.
"Even when the movements are very similar, the activation seems much, much higher in handwriting," Audrey says. "It shows that there's more involvement of these brain regions when you're handwriting, which might give you some specific advantages."
These findings suggest that there are distinct processes of brain activation happening while a person types or writes. This boost of stimulation of handwriting facilitates learning because these particular waves between these areas are involved in memory formation and encoding (编码) .
And although handwriting may help with learning processes, typing is often easier, faster and more practical. "Students and teachers alike should therefore consider the task at hand to decide to hand write or type," Audrey says. Despite the need for more studies to determine the best learning strategy, experts say that handwriting shouldn't be left behind in the digital age. "Schools need to bring in more writing into curriculum design," Ruud says.
(1)、What did Audrey and Ruud mainly do in their research?A、They tested the function of electrodes. B、They analyzed the brain structure. C、They monitored the brain activities. D、They recorded the writing speed.(2)、Why can handwriting improve learning more than typing?A、It involves more specific brain activation. B、It promotes better muscle memory. C、It allows for more innovative thinking. D、It encourages better concentration.(3)、What's the author's attitude toward typing?A、Favorable. B、Objective. C、Doubtful. D、Unclear.(4)、What might be the best title for the text?A、Taking Notes by Hand is Becoming Uncommon in Class B、Using Keyboard is Recommended Due to Its Convenience C、Widespread Brain Connectivity is Crucial to Human Learning D、Handwriting Boosts Brain Connections More Than Typing Does -
5、 阅读理解
What do you do with your old clothes? You might throw them away, or if you want to be more environmentally friendly, you could sell or donate them. No matter what you choose, it's always been your responsibility to deal with them. However, a new California law could shift this responsibility to clothing producers.
This pioneering law, called the Responsible Textile Recovery Act, is targeted to set requirements for producers of clothing, towels and bedding. It requires them to develop and fund a statewide program for reusing, repairing and recycling their products. The law could help address the long-standing pollution caused by the textile (纺织) and fashion industries, noted The Guardian.
Since 1960, the amount of textile waste in the US has grown nearly tenfold, reaching over 17 million tons in 2018, according to the US Environmental Protection Agency. A shocking 85 percent of textiles end up in landfills where they send out harmful gases and chemicals into the environment. As a major polluter, the fashion industry accounts for about 10 percent of global carbon emissions (排放), more than international flights and shipping combined, according to the United Nations. The rise of "fast fashion", which produces cheap, low-quality clothing meant to be worn only a few times, has significantly worsened this environmental crisis.
The serious pollution drove Democratic state senator Josh Newman, who drafted (起草) the Responsible Textile Recovery Act, into action. He communicated with all sectors of the textile industry to prevent opposition.
Some worry the law could make shopping more expensive and impact small and medium-sized brands. However, Newman said people shouldn't notice any price increases, estimating it would cost producers less than 10 cents (0.7 yuan) per item.
The program is expected to begin as early as 2028 in the hope of making the industry more sustainable (可持续的). It could also open new opportunities for green production and consumption while creating more than 1,000 green jobs.
(1)、What does the new California law intend to do?A、Increase textile production. B、Ban the use of certain textiles. C、Reduce textile pollution. D、Promote fast fashion products.(2)、What does the underlined word "landfills" in Para.3 probably mean?A、Textile factories. B、Recycling centers. C、Waste burial sites. D、Chemistry labs.(3)、What concern do some people have about the new law?A、It could raise the price of clothes. B、It might reduce jobs in the fashion industry. C、It could lower the quality of clothing. D、It might affect the popularity of certain brands.(4)、Which section of magazine is the text most probably form?A、Fashion. B、Politics. C、Entertainment. D、Environment. -
6、 阅读理解
At just 18 years old, Khalifa Aminu from Kano, Nigeria, has proved himself as an amazing inventor, with his sensory glasses designed to help the visually impaired (视障人士).
The glasses are fitted with infrared sensors (红外传感器) that can "see" obstacles in the user's path, warning them about possible dangers without the need for traditional walking sticks or guide dogs. In their current form, the glasses let out a beeping sound when an object is nearby, helping users move past it safely. Aminu is now working on making the glasses even more effective, particularly in low-light and nighttime conditions.
Aminu's journey into the world of invention began in childhood. He started small, building a canoe (独木舟) as his first project, and quickly realized that his creations could be used to solve real-world problems in his community. This love for invention has led him to create various innovations such as a radio station, a bomb detector and an automatic water sprayer for farmers.
As for how Aminu came up with the idea of his latest creation, Aminu explained, "I grew up in an area where there are visually impaired people, and I understand what they're going through. This is why I began the process for a technology-based solution for them."
The glasses have received positive feedback from testing. In a recent trial, a blind man was highly impressed by their effectiveness. "He suggested several improvements, like a wireless switch, smaller parts, and lenses for better usability," Aminu explained. "These suggestions will be carried out in future versions, but the challenge remains the lack of materials and resources for further development."
Luckily, in June, Aminu's invention caught the attention of Nigeria's National Commission for Persons with Disabilities, suggesting a bright future for him in further innovation and mass production. "My ultimate dream is to build a global company that continues to develop innovative technological solutions not only for Nigeria but for the world," said Aminu.
(1)、What is true about the sensory glasses that Aminu invented?A、They replace the need for traditional walking sticks completely. B、They use infrared sensors to detect obstacles and warn users with a noise. C、They can only work in bright daylight conditions. D、They are fitted with cameras to show the path ahead to the users.(2)、What's Aminu's inspiration for sensory glasses?A、His concern about real-world problems. B、His love for creation. C、His sympathy for the visually impaired. D、His interest in technology.(3)、What can be inferred about the future of sensory glasses?A、They will face immediate mass production. B、Despite the challenges, there is a possibility of growth and expansion. C、The lack of materials and resources will stop the project. D、The glasses will only be used in Nigeria.(4)、Which of the following can best describe Aminu's personality?A、Ambitious and innovative. B、Optimistic and far-sighted. C、Modest and hard-working. D、Confident and curious. -
7、 阅读理解
Oklahoma, one of America's Southwest Region, is full of fascinating history. While much can be learned about the state's past by visiting larger urban areas like Oklahoma City, the state capital, and Tulsa, those in the know will include at least a few smaller towns on their travel plans.
Guthrie
Guthrie was Oklahoma's first state capital and a focal point of the Land Run of 1889, an important event that saw thousands of settlers rushing to claim land across the Southwest. Guthrie Historic District is one of the best-preserved collections of Victorian-era architecture in the United States and encompasses over 2,000 buildings, including the Oklahoma Territorial Museum and Carnegie Library, home to fascinating exhibits about Guthrie's early years.
Ardmore
Ardmore became an important hub for the nation's oil boom of the early 20th century. Its downtown retains much of its historic charm and early wealth, including the Santa Fe Depot, built in1915, which now houses the Greater Southwest Historical Museum. The Ardmore Public Library, dating to 1905, is another significant site that has been well-preserved, as is the Colcord Building, constructed in 1894 and one of Oklahoma' s oldest standing structures built with steel (it's now a luxurious 4-star hotel under Hilton's Curio brand). Be sure to also head out into the surrounding Arbuckle Mountains and nearby Lake Murray for a scenic drive.
Pawhuska
Pawhuska is the heart of the Osage Nation and played an important role in Oklahoma's oil boom. The town's fascinating past is enshrined in landmarks like the Osage Nation Museum, established in1938, and the oldest tribally owned museum in America, which describes Osage history, art, and culture vividly; while the 1914 Constantine Theatre is a striking reminder of early 20th-century entertainment that continues to host performances.
(1)、For visitors interested in Victorian buildings, which is the most recommended?A、Osage Nation Museum. B、Ardmore Public Library. C、Constantine Theatre. D、Guthrie Historic District.(2)、Which building was remodeled into a hotel?A、Colcord Building. B、Oklahoma Territorial Museum. C、Ardmore Public Library. D、Santa Fe Depot.(3)、What is the purpose of the passage?A、To offer travel routes. B、To explain the history. C、To introduce towns worth visiting. D、To advertise travel. -
8、请你以" Better learning habits lead to better results."为题, 用英语写篇短文投稿, 内容包括:
1. 谈谈两者之间的关系;
2. 举例说明;
3. 提出建议。
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9、 We must promote originality, inspire creativity and encourage (革新).
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10、 I can't think of any possible explanation for his (缺席) .
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11、 Both sides (承诺) themselves to settle the dispute peacefully.
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12、 Finally I managed to p my classmates to accept my idea.
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13、 Nankai University,(创建) in 1919, has a history of more than 94 years.
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14、阅读下面材料,在空白处填入1个适当的单词或括号内单词的正确形式。
More than 500 pieces of relics ( discover) in recent months at the legendary Sanxingdui Ruins site in Southwest China's Sichuan province, dazzling archaeologists with their historical value as well as the display of creativity.
The relics, discovered at the six new sacrificial pits of the ruins, include golden masks, jade and ivory artifacts and bronze wares were delicately built and ( unique) shaped, said the Sichuan Provincial Cultural Heritage Administration.
The new finds bring the total number of items discovered at Sanxingdui to nearly 2,000 the excavation(挖掘) of No.3 to No.8 sacrificial pits began in October last year.
" The new discoveries demonstrate once again that ( imagine) and creativity of the ancient Chinese far surpassed people today have expected," said Tang Fei, chief of the Sichuan Provincial Cultural Relics and Archaeology Research Institute.
Tang added that the excavation of the new pits has entered a critical stage, more items yet to be unearthed and expected to challenge the conventional ( wise) of archaeologists.
Originally discovered in the late 1920s, the Sanxingdui Ruins have been referred to as one of the world's greatest archaeological finds of the 20th century.
Located in the city of Guanghan, around 60 km from the provincial capital Chengdu, the ruins covering area of 12 square km are believed to be the remains of the Shu Kingdom,( date) back some 4,500 to 3,000 years.
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15、阅读下面短文, 从每题所给的A、B、C、D四个选项中选出可以填入空白处的最佳选项。
It has been an unwritten rule that those who become 30 years old must have already been in a stable(稳定的) place. 1 , they might be considered a failure.
I am turning 30 tomorrow and I ask myself," Should I 2 this deadline?"I am still renting an apartment, and living alone. This seems far from 3 for most, but it looks nice to me.
When I graduated years ago, I 4 worked as a journalist because I had been dreaming of writing stories for the 5 since childhood, and I thought I would stick to it forever. But as time flies, I realize that it will be unwise to 6 myself to just one path. Therefore, I decide to start my another pursuit— studying law.
Was I 7 before? No. I have learned that there is no single formula (公式) for8 and happiness. Our lives are filled with 9 possibilities. While I really love my . current career, I have also been interested in being a 10 . So why should I11 the dream to the end just because I am 30 already?
Turning 30 can also be a chance to do whatever you like. You needn't care about how others will12 your decisions. The most important part is that you are just being yourself and13 it. Turning 30 is just like any other birthday. Stop feeling 14 about your age and try to 15 all the opportunities and surprises that life throws on your way.
(1)A 、 Moreover B 、 However C 、 Therefore D 、 Otherwise(2)A 、 fear B 、 approach C 、 determine D 、 miss(3)A 、common B 、 active C 、 satisfactory D 、 stressful(4)A 、 strangely B 、 immediately C 、 previously D 、 magically(5)A 、 public B 、 villager C 、 customer D 、 foreigner(6)A 、 turn B 、compare C 、 limit D 、 confirm(7)A 、 impressed B 、 wrong C 、 powerful D 、 cheerful(8)A 、 freedom B 、 independence C 、 existence D 、 success(9)A 、 obvious B 、 reasonable C 、 endless D 、 practical(10)A 、 lawyer B 、 teacher C 、 writer D 、 journalist(11)A 、 look for B 、 think about C 、 make up for D 、 hold on to(12)A 、 ignore B 、 judge C 、 recognize D 、 respect(13)A 、 observing B 、 stressing C 、 doubting D 、 enjoying(14)A 、 anxious B 、 content C 、comfortable D 、 exciting(15)A 、 assume B 、 accept C 、 leave D 、 ignore -
16、根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
A Few Tips for Self- Acceptance
We all want it. .. to accept and love ourselves. Where do you start? Here's a handful of ways that will set you in the right direction.
• Stop comparing yourself with others. Do not follow the people who make you feel not- good- enough. Are you hoping that eventually you will feel empowered because your life is better than theirs? Know that your life is your own; you are the only you in this word.
· We are often ashamed of our shortcomings, our mistakes and our failures. Remember, you are only human. You will make mistakes, time and time again. Rather than getting caught up in how you could have done better, why not offer yourself a compassionate(有同情心) response?" That didn't go as planned. But, I tried my best."
●Recognize all of your strengths. Write them down in a journal. Begin to train your brain to look at strength before weakness. List all of your accomplishments and achievements. Nothing is too small to celebrate.
●Now that you' ve listed your strengths list your imperfections. Turn the page in your journal. Put into words why you feel unworthy, and why you don't feel good enough. Now, read these words back to yourself. Turn to a page in your journal to your list of strengths and achievements. See how awesome you are?
A. But at times it seems too difficult and too far out of reach.
B. Feeling upset again?
C. You have a job, earned your degree, and you got out of bed today.
D. Forgive yourself for mistakes that you have made.
E. Why do you follow them?
F. Set an intention for self- acceptance.
G. When does the comparison game start?
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17、 阅读下列短文, 从每题所给的四个选项(A、B、C、D)中, 选出最佳选项。
Ramirez Castañeda, a Colombian biologist, spends her time in the Amazon studying how snakes eat poisonous frogs without getting ill. Although her findings come in many shapes and sizes, she and her colleagues have struggled to get their biological discoveries out to the wider scientific community. With Spanish as her mother tongue, her research had to be translated into English to be published. That wasn't always possible because of budget or time- and it means that some of her findings were never published.
" It's not that I'm a bad scientist," she says." It's just because of the language."
Castañeda is not alone. There is plenty of research in non- English- language papers that gets lost in translation, or is never translated. A research looked through more than 400, 000 peer- reviewed papers in 16 different languages and found 1,234 studies providing evidence on biodiversity conservation which, because they weren't in English, may have been overlooked. These included Japanese- language findings on the effectiveness of relocating the endangered Blakiston's fish owl, the largest owl species.
Some experts argue that for the sake of the bigger picture, scientific knowledge should converge(转换) into one common language. Science is very globalised and becoming more so, so the use of a global language is enormous for that.
Of course, scientists can work with an English partner, or use a translator- but this ultimately strengthens the cycle of dependency on the global north, leading to inequality in international influence. The specific meanings of words can also pose a problem in translation. For example, it is difficult to find in English one single word to describe forest snakes and frogs in the work Castafieda does with indigenous(土著的) communities in the Amazon.
" So we' re losing observations for science, too," says Castañeda." For me, it's not possible to just have everything translated into English. We need multilingual(多语种的) science, and we need people that feel comfortable doing science in their own languages. It could be possible to switch to a world where, say, Chinese, English and Spanish are the three languages of science, just as English, French and German were the languages of science in the 19th century."
(1)、What prevented Castañeda's discoveries from being more widely known?A、Poor management. B、Opposition from her colleagues. C、Her bad reputation. D、The language barrier.(2)、What's the consequence of the dominant focus on English in scientific research?A、Inefficient wildlife conservation. B、A knowledge gap in the scientific world. C、A growing interest in non- English papers. D、Inadequate job opportunities for translators.(3)、What does the author want to illustrate by mentioning forest snakes and frogs?A、The urgency to protect rare species. B、The need to adopt one global language. C、The challenges in translating scientific texts. D、The biodiversity on the South American continent.(4)、What is presented in the last paragraph of the text?A、A potential solution. B、A theoretical model. C、A popular belief. D、A global trend. -
18、 阅读下列短文, 从每题所给的四个选项(A、B、C、D)中, 选出最佳选项。
Uggs(雪地靴) are certainly ugly, or at least inelegant. The shapeless boots, pulled on in a hurry, can make anyone look like a slob(懒惰的人), which has made them the target of disrespect. It hasn't been hard to find someone strongly condemning them." Ugg boot s are no sexy," The Independent declared in 2003," unless you' re Mrs. Bigfoot on a lo ne mission across Antarctic to find Mr. Bigfoot. When wearing the boots, a writer of The Gloss complained," There's nothing to indicate that you don't have square, horrible shoeboxes in place of human feet." In 2015, one coffee shop on Brick Lane in east London ever banned ugg- wearers.
And yet, over the years, plenty of strange and unattractive shoes have met with the approval of the fashion establishment. The problem with ugg' s wasn't that they were ugly; it's that they were common.
But a funny thing happened on the way to fashion's tomb: the universal ugg has not gone anywhere. Uggs have quietly stayed here since their best time. Once you start paying attention, you' ll be shocked to discover how many people are still wearing them. They are worn by mothers in town and in the country, by teenagers on Saturday shopping trip and by people in fashion.
Perhaps the secret of uggs's unstoppable success is that, if there is a dividing line between public appeal and private style, it might be a pair of cozy boots. They are certainly comfortable, soft and warm, as if your feet were in the hugging of someone who really loves you. At$150a pair, they are neither cheap nor entirely out of range. They are casual and indulgent(纵容的).
Somehow uggs, the boots that so many people hate, have managed to challenge the cruel logic of the fashion cycle and carry on whether you approve of them or not.
(1)、What is the best title of the passage?A、Uggs Refuse to Die B、Uggs Have Existed So Long C、Uggs Enter the Fashion Circle D、Uggs Have Gone Somewhere(2)、Why does the author quote many media's words in the first paragraph?A、To prove uggs' toughness B、To prove uggs's popularity C、To prove people's approval D、To prove people's condemning.(3)、What does the author think very strange?A、Uggs are very common B、Uggs are inelegant and ugly C、Uggs are worn by teenagers D、Uggs stay there regardless(4)、What is the secret to the success of uggs according to the passage?A、They are very comfortable B、They own private style C、They have public appeal D、They are very cheap -
19、 阅读下列短文, 从每题所给的四个选项(A、B、C、D)中, 选出最佳选项。
As far as we know batteries are playing an important role in our life. We couldn't live without batteries. Why so? Batteries provide power for anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri (MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.
" To provide enough power, we need certain methods with high energy density (密度)", said Jae Kwon, assistant professor of electrical and computer engineering at MU." The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries."
Kwo n and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro/ nanoelectromechanreal systems(M/NEMS). Although nuclear batteries can cause concerns, Kwon said, they are safe.
" People bear the word‘ nuclear' and think of something very dangerous," he said," However, nuclear power sources have already been safely powering a variety of devices, such as pace- makers, space satellites and underwater systems."
His new idea is not only in the battery's size, but also in its semiconductor(半导体). Kwon's battery uses a liquid semiconductor rather than a solid semiconductor.
" The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor, Kwo n said," By using a liquid semiconductor, we believe we can minimize that problem."
Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwo n is working to build and test the battery. In the future, they hope to increase the battery's power, shrink its size and try with various other materials. Kwo n said that battery could be thinner than the thickness of human hair.
(1)、According to paragraph 1 and 2, we can learn that ____.A、batteries can only power small sensors B、the larger batteries are, the more power they can provide C、Jae Kwo n is working hard to improve chemical batteries D、certain methods with high energy density can provide power abundantly(2)、Jae Kwo n gave examples in Paragraph 4____.A、to introduce various energy sources B、to describe a nuclear- powered system C、to introduce nuclear batteries can be safely used D、to show chemical batteries are widely applied(3)、Liquid semiconductor is used to ____.A、get rid of the radioactive waste B、decline the damage to lattice structure C、test the power of nuclear batteries D、decrease the size of nuclear batteries(4)、According to Jae Kwon, his nuclear battery ____.A、could be extremely thin B、will soon replace the present ones has. C、uses a solid semiconductor D、passed the final test -
20、 阅读下列短文, 从每题所给的四个选项(A、B、C、D)中, 选出最佳选项。
Museum lets visitors walk in the shoes of a police officer
Police shows on TV are filled with high- speed car chases and crimes solved in a few minutes. But that's not a typical day for a real- life police officer. To get a more accurate picture, head to the National Law Enforcement Museum in Washington. Exhibits there invite visitors to use their senses of sight, hearing, touch and smell to gather information the way police do.
Let's look at a few exhibits.
K-9 Units
See a video of how dogs are trained to join K-9 Units. Test your ability to smell and identify various scents(气味). Learn which kinds of dogs are better at tracking bad persons while others are better at sniffing out dangerous goods.
The Web of Law Enforcement
You' ll quickly learn that crime- solving is a team effort, not only within one department, but among organizations across the country. Inspection Service is just one of the law enforcement groups helping local police when needed. For example, six organizations worked together on a national park graffiti(涂鸦) case.
Five Communities
Every community is different. Learn how the needs and challenges of five communities are being dealt with. These communities goals are to develop programs, while increasing trust between local people and police. What might work in your neighborhood? There's a place for visitors to share their thoughts.
The Training Simulator
Those aged 12 and older can try the same training scenarios(方案) and . equipment used in professional law enforcement classes in which police try to resolve difficult situations. Short videos test participants' abilities to observe accurately and think quickly before reacting.
The exercises give an understanding of what officers face on a daily basis.
" Many kids first think it's like a video game," said Alan Davis, an educator and New York police officer." They soon realize that real- life decision- making in a second isn't easy, and they freeze. For real police there are no second chances."
(1)、Which exhibit focuses on police dogs?A、K-9 Units. B、Five Communities. C、The Training Simulator. D、The Web of Law Enforcement.(2)、What does The Web of Law Enforcement show?A、The problems in communities. B、The dangers of being a police officer. C、How team work matters in solving a case. D、How a policeman makes a decision instantly.(3)、How may kids feel about the short video tests after taking part in them?A、They are surprising. B、They are difficult to understand. C、They are the same as video games. D、They are not real- life experiences at all.