相关试卷

However, some experts also warn us that smart devices can easily go wrong and we should use them wisely them.

the smart devices are!

Moreover, some devices like laptops and pads also the way we study and shop.

First, smart watches . We wear them to check our sleep and heart rate.

Smart devices in our daily life.

Solar panels (太阳能板) are a great invention that can turn the sun's h and light into electricity. This technology is clean and green. In many countries, we can see a great number of these panels in sunny places. One of the key b of them is that solar power does not need to burn fossil fuels like coal or oil, which helps to protect our environment.

The use of solar energy has a very p effect on our planet. It greatly reduces air pollution and helps in the fight against climate change. For many families, putting solar panels on the roof is a smart choice. A the weather can sometimes be a challenge because solar power needs sunlight, it is still a great energy source for our future. Scientists are also working hard to make solar panels even cheaper and b so that they can change more sunlight into electricity and people can use them more conveniently and smoothly.

Qumu Shiwu works in a workshop in Xichang City, Sichuan Province. She is good at making Yi lacquerware (漆器). Now, she uses short videos to share this traditional art with more people.

"Red means passion (热情), yellow means harvest, and black means nature," Qumu Shiwu explained. Making Yi lacquerware is not easy. It takes at least three months to make one bowl. They use tools like saws and hammers (锯子和锤子), along with a special technique to join wood pieces.

Yi lacquerware is special because of its designs. The shapes are the same, but the decoration is different and hard to make. Small and medium pieces are painted directly without a base coat (底漆), showing the workers' skills.

Qumu Shiwu learned this craft from her father and started sharing it online in 2017. Her videos show how lacquerware is made, and one video of a lacquered chair got over 500,000 likes. Because of her efforts, this traditional craft is still popular today.

A. She hopes more people will love Yi lacquerware.

B. Yi lacquerware is famous for its use of three main colors.

C. Many workers work together because the process is very difficult.

D. Most patterns are painted by hand, using lines to make lively designs.

E. She knows how to perform over 40 steps to create these beautiful items.

He asked the soldiers to line up in rows (排，行) of 3. When they did, 2 soldiers were left. Then he told them to line up in rows of 5, and this time 3 soldiers were left. Finally, he made them line up in rows of 7, and 2 soldiers were left.

Han Xin thought for a moment and said, "We have 233 soldiers". Everyone was surprised. How did he know that so quickly?

Han Xin used a special maths method wisely. He just looked for a number that fits three simple rules: when you make groups of 3, 2 are left; make groups of 5, 3 are left; make groups of 7, 2 are left. The smallest number that works is 23. But his army was much bigger. He knew that if he added 105 (which is 3×5×7) to 23, the new number would still fit the rules. Adding 105 twice to 23 gives 23+105+105=233, which was just right for his army size.

This story shows that maths can solve problems in clever ways. Even today, this kind of maths called "remainder problems" (盈亏问题), is still used in many fields. Ancient stories teach us useful maths skills. How great they are!

As one of China's most famous mountains, Mount Tai welcomes over 8 million tourists every year. With such a large number of visitors, lots of rubbish is created every day, and transporting this large amount of waste has always been a big problem. That's why the robot dog has been brought in.

We believe the best ways to solve the problem are drone transport (无人机运输) and robot dog transport, according to a worker from the Taishan Cultural Tourism Group's property (房地产) company. The company has worked with a few technology companies and they have finally chosen Unitree Robotics to do rubbish transport tests.

Jin Da, a manager at Unitree Robotics, said that the robot dog, Unitree B2, is very good at walking on stairs. And it can keep balance even on wet or difficult ground when climbing the mountain. It can also easily get over things like piles of wood and steps as high as 40 cm. Besides, the robot dog has a battery life of four to six hours, and it can carry a weight of 120 kg.

After three days of testing, the robot dog could get used to 80% of the road conditions (状况) on Mount Tai. The successful climb shows how reliable and useful it is in difficult conditions. And this also provides important experience and data for future uses, such as rescue work, exploration, transport, and other areas. "We are still testing the robot dog, and we will further improve the design to start the next round of testing as soon as possible," Jin said.

Wei Dongyi was born in Shandong in 1991. Growing up, he lived in a world full of numbers. His father, a maths teacher, often shared interesting maths stories with him. One day, when he was a young boy, he read a special book about maths. From that moment on, he showed great interest in maths. He would sit at his desk for hours, trying to solve the most difficult problems, and he never felt bored.

When Wei was in middle school, he joined the school's maths team. Even though he was younger than many team members, hestood out quickly. Once, his classmates spent days on a hard maths problem. But Wei found a clever way to solve it in just a few minutes. His teachers were so excited that they called his solution the "Wei's Method".

At the age of 16, Wei took part in the International Mathematical Olympiad (IMO), a very famous and difficult maths competition. He faced six tough problems, but he solved them all perfectly and got full marks. What's more, he did it again the next year. Because of his excellent performance, he entered Peking University without the college entrance exam.

Now, as a teacher at Peking University, Wei still loves maths more than anything else. He spends his days studying new maths ideas and helping students. His story teaches us that with love and hard work, we can all become wizards in our own ways.

In ancient times when a man wanted to tell how many animals he3, he had no system of numbers to use. He had to put a4 into a bag for each animal. The more animals he owned, the more stones he had. In this way, the ancient people knew the number of the animals. It may explain5 the word "calculate" comes from the Latin word "calculus." "Calculus" means "stone".

Then, human beings used lines to count. People would just draw a line for each thing they wanted to count, but they still had no6 to tell the numbers. There was not any symbol they could use to express the number, so they could not write the numbers down.

Later on, people used fingers. Again, we have the word that goes back to this. The word "digit"7 the Latin word "digitus". It means "finger". Everyone has 10 fingers so it8 the use of 10 in the system of numbers. This system of numbers was created by Indian mathematicians. They9 the numbers we use today. Later, the Arab traders10 it to Europe during the 9th century and made it used wisely. In this way, people count things with ten numbers: 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0. It is called decimal system. That is to say, it is built on the base of 10.

Ted took out his tools and began to work. After4 busy in the kitchen for one afternoon, he created a new invention. He took a broken wood mixer (搅拌器) apart and then connected a motor (电动机) to the wooden stick. When he turned it on, it was able to stir things by itself5 it got power from the motor. It was so convenient that anyone6 stir the sauce easily and quickly.

The next day, Ted showed his7 to his mother. She was surprised and allowed him8 more time improving it. He tried, failed and then tried again. Finally, he added9 new. He made a timer so that the user could leave the tool on the table without being worried about burning the sauce.

Ted's invention turned out to be as10 as mum's old mixer.11 mum's support, Ted decided to bring it to school and introduce it to his eight12 schoolmates. Suddenly, Ted's invention became a big hit in his school. They used it to mix drinks or stir13 kind of sauce at lunch, and it was also easy to clean and store. When his friends used the invention, Ted watched them14 to see if there were any problems. In School Science Festival, Ted even received15 prize from the school for his creativity and intelligence.

Perhaps not everyone can be an inventor. However, it is always meaningful to find out what you are really interested in and keep going like Ted.

注意：

1.词数70左右（文章开头已给出，不计入词数，请根据要点提示适当发挥）。

2.不得透露学校、姓名等任何个人信息，否则不予评分。

参考词汇："永不放弃的人"："The Man Who Never Gave Up"。

Thomas Edison was a very famous American inventor.

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

the animal world is!

These skills in their survival.

bird, like the parrot, can even small numbers!

We should protect animals ignoring them. Otherwise, they may .

This ability how humans use numbers.

Elephants can remember , like food and water.