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假定你是李华，你与外国朋友 Johnson 打算在周末去爬武当山,请给他发一封电子邮件，内容包括:1. 武当山的位置(湖北省十堰市西南部); 2. 爬山前的准备(了解天气、必备物品等); 3. 注意安全,避免受伤。

注意：1. 词数80左右; 2. 开头和结尾已给出，不计入总词数。

Dear Johnson，

Yours ,

Li Hua

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的一下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧),并在其下面写出该加的词。删除：把多余的词用斜线(\)划掉。

修改：在错的词下画一横线,并在该词下面写出修改后的词。

注意：1. 每处错误及其修改均仅限一词; 2. 只允许修改10处,多者(从第11处起)不计分。

Many teachers are talking about the importance of after-class activity, that is believed to bring more creativity to the class. Actually, the traditional class pays much attention to the knowledges from the books all the time, and it is easy let students feel bored. As a result, every student is so exciting about the PE class, so they can enjoy the freedom in it. After-class activity offers students in a different way to broaden their mind and inspire their creativity. Students feeling relaxed and can think in an actively way. Many great people get his idea from nature, so if teachers wanted to improve students' interest, the good learning place should not be limited in the classroom.

China has designated （指定) a special day for farmers to celebrate the annual harvest. It is the first festival  (create) by the state specifically for the country's fanners. The Chinese farmers, harvest festival falls on the Autumnal Equinox (秋分)each year,  (start) from 2018. Autumnal Equinox  (usual) falls between September 22nd and 24th, during the country's  (agriculture) harvest season. 

As we all know, China has largest population in the world. It (be) not easy to feed the largest population in the past. With the development of modern agriculture, people's life is getting better and better. The festival helps to give greater importance to rural work and speed up the construction of rural vitalization (振兴). (variety) of celebrations will be organized to display the harvest, rural technology achievements and farmers, creativeness. Fanners are encouraged  (take) part in some activities,  are related to their work and life. Rural vitalization is a key part of China's efforts to develop a modernized economy. developing its vast rural regions, China expects to see a beautiful countryside and well-off farmers. 

Nancy took me by the hand. This was the third1 she was placing me in. Standing before me were the middle-aged couple, Allie and her2 Alex. Over the following weeks, we fell into quite a (n)3 routine. Allie would make pancakes for breakfast, or Alex would fry some sausage and4 . They sang a lot, even5 as they cooked. 

I kept6 something to happen. When would they start7 a loss of pancakes if I didn't mow the lawn (修剪草坪)? When would the sausage and eggs be8 with unidentifiable soup? But, it never9 . They kept cooking, singing, and dancing.

Then on a Saturday afternoon, Allie10 to paint the fireplace white. As we were busy working, we found a tiny treasure11 . We looked at each other in12 and excitement. She said, " I wonder if the leprechauns (精灵) left it!" I couldn't help but13 and lean (倚靠) into her a little.

Allie14 me to open the box. Inside was a beautifully sculptured wooden15 . Folded underneath was a piece of paper that read: " My sweetie, today is the 100th day after Nancy passed your16 into mine and we took you home. We simply cannot17 the rest of our lives without you. We love you and will be with you18 . This lovely dog was19 by Alex and me. Do you like it?"

My eyes flooded with tears. It20 , love comes in all shapes and sizes, even a tiny treasure box. 

Facing our failures can be difficult, but it is valuable. Failures are not the endings, but the beginnings of learning experiences that can help inspire you onto the next success. . 

·Admit Your Mistakes

The biggest difficulty we face in getting over our failures and turning them into successes is admitting we have made a mistake. If we don't, we might be caught in a cycle of shame and self-doubt. .

·Make Good Use of Fear 

Making a mistake, no matter how big or small it is, can be frightening. . But when we come to recognize that we can't avoid fear, we can accept our mistakes, correct them, and move forward confidently.

·

Sometimes, the best thing we can do when we fail is to ask someone to help us. We could be shy to reach out to others for help when we feel like we haven't done our best. Telling people why you think you failed, and what you need help with is considered to be strength. Many people who have failed in their own ways will be there to lend a hand to help you achieve your goals.

·Plan for the Next Failure

. You are certain to fail again, but you don't need to be afraid of failing. When you plan for failure, you are able to reduce the potential damage to the lowest possible level, and make it easier to move on to the next success.

A. Failure gives you a chance 

B. Go to find someone for help 

C. Fearful thoughts can disappoint you 

D. I don't see anything that I do as a failure or a success

E. We eat, we breathe, and we fail, so failure is a natural part of life 

F. Read on if you are still confused how to find some form of success in your failures 

G. However, after we admit we made a mistake, we can then make an effort to find a way out

Claude Monet, Pablo Picasso and Leonardo da Vinci . . . the art world has never lacked talent. And now, a new painter is ready to join the list, although this one isn't even human.

Next month, the auction house (拍卖行) Christie's Prints and Multiples will make history by offering the first piece of artwork created by artificial intelligence (AI) for sale. The painting is a portrait of a man called Edmond, and is expected to be sold for up to $ 10,000.

The work, which features a man with a mysterious look on his face, was created by software developed by a French art group. Nicolas Laugero Lasserre, an art collector, called the work "strange but amazing". This isn't the first example of AI produced artwork, as AI has already been used to write poems and compose songs. However, many people doubt whether it should be called art at all.

According to Russian writer Leo Tolstoy (1828-1910), art is about creating emotion. It's "a means of joining people together in the same feelings," he once said.

So, if the emotion behind art is what makes it, the ability to create and use tools is what makes human beings different from other species. And as a tool itself, the AI technology used to create the portrait is the result of a lot of efforts made by several designers. Together, they "fed" the AI many paintings from the 14th to the 18th centuries, until it was able to work out how to make similar paintings of its own.

The introduction of AI art could be the beginning of a new artistic movement. However, not everyone is ready to welcome these high-tech artists. 

"The human mind is what's behind the AI technology. And the human mind is not a cold, hard fact," said Oscar Schwartz, a professor of AI. "Rather, it is something that's created with our opinions and something that changes over time. "

"It's raining. It's pouring. The old man is snoring(打鼾). He bumped his head when he went to bed, and he couldn't get up in the morning. " Why couldn't the old man in the children's song get up? (Let's kindly suppose that he just didn't want to get up) This was possibly because in the absence of sunlight, the body was still producing the hotmon(激素) melatonin(褪黑素), which makes people sleepy. 

There are many ways that rainfall affects human behavior. But how much does rain really affect people's moods and behavior?

In 2008, researchers from the University of Minnesota and Lanzhou University published a paper. They proposed that decreased rainfall was influential in social upheaval(社会动荡) and the downfall of the Tang, Yuan and Ming dynasties in ancient China. This is thought to be related to reduced rice cultivation. 

But how might rain affect social behavior in the modern world? A 2009 New York Times investigation found that murder rates in New York drop significantly on rainy days. Meanwhile, in Britain, Dr Peter Langmead Jones of Greater Manchester police published a study in 2015 detailing an analysis of 6.6 million police records over one decade in Manchester. "The research showed that the heavier the rainfall, the lower the recorded crime," he said. 

Langmead Jones also found that there is a strong association between heavy rain and relatively few violent crimes recorded including domestic abuse(家庭暴力). This might be because heavy rain stops people from going out to buy alcohol and the reduced alcohol consumption results in fewer crimes. 

It's not all good news though. One study in 1997 concluded that the behavior of children can predict oncoming storms—they were observed to exhibit their worst behavior when barometric(气压的) pressure fell. Another study in 2012 found that women are much more likely to be affected psychologically by rain and that they report much lower levels of life satisfaction than men on rainy days. 

For all the complaints about rain, it does have some characteristics that hold broad appeal. The sound of raindrops can be very comforting and often features in sleep- inducing relaxation apps. The theory behind this is that the pitter patter of raindrops is a form of "pink noise". It can decrease brain activity and consequently improves the quality of sleep. So if it's raining where you are, the best thing to do may be to have a nap. 

A new study published in the National Academy of Sciences provides a measure of how far "deepfake" technology has progressed. The results suggest that real humans can easily fall for machine-generated faces. "We found that AI-generated faces are highly realistic," says study co-author Hany Farid, a professor at the University of California, Berkeley. The result raises concerns that "these faces could be highly effective when used for criminal purposes. "

The synthetic (合成的) faces for this study were developed in back-and-forth interactions between two neural networks. One of the networks, called a generator, produced an evolving series of synthetic faces like a student working progressively through rough drafts. The other network, known as a discriminator, trained on real images and then graded the generated output by comparing it with data on actual faces. The generator began the exercise with random pixels (像素). With feedback from the discriminator, it gradually produced realistic humanlike faces. Ultimately, the discriminator was unable to tell a real face from a fake one. 

After collecting 400 real faces matched to 400 synthetic versions, the researchers asked 315 people to separate real from fake among a selection of 128 of the images. Another group of 219 participants got some training and feedback about how to spot fakes as they tried to separate the faces. 

The first group did not do better than a coin toss at telling real faces from fake ones, with an average accuracy of 48. 2 percent. The second group failed to show dramatic improvement, receiving only about 59 percent, even with feedback about those participants' choices. 

The researchers were not expecting these results. The finding adds to concerns about the accessibility of technology that makes it possible for just about anyone to create misleading still images. Another concern is that such findings will create the impression that deepfakes will become completely undetectable and as a result, scientists might give up on trying to develop countermeasures (对策) to deepfakes. 

The researchers end with a straightforward conclusion after emphasizing that misleading uses of deepfakes will continue to pose a threat: "We, therefore, encourage those developing these technologies to consider whether the associated risks are greater than their benefits. If so, then we discourage the development of technology simply because it is possible. "

Four Environmentalists You Should Know

Throughout history, environmentalists have had a great influence not only on natural spaces, but also on our individual lives. Here are four influential ones. 

   John Muir (1838~1914)

His lifelong love for hiking began when he hiked to the Gulf of Mexico in 

1867. Muir spent much of his adult life wandering in—and fighting to preserve—the wilderness of the West, especially California. His tireless efforts led to the creation of Yosemite National Park, Sequoia National Park, and millions of other conservation areas. 

   Rachel Carson(1907~1964)

Born in rural Pennsylvania, Rachel Carson went on to study biology at Johns Hopkins University. After working for the US Fish and Wildlife Service, Carson published The Sea 小

Around Us and other books. Her most famous work, however, was 1962's Silent Spring, in which she described the harmful environmental effects of pesticides（杀虫剂）. After Carson's observations were proven correct, pesticides like DDT were banned. 

   Wangari Maathai (1940～2011)

Wangari Maathai was from Kenya. After studying biology in the US, she returned to her home country to begin a career in environmental activism. Mathai founded the Green Belt Movement, which, by the early 2lst century, had already planted some 30 million trees, provided jobs, and secured firewood for rural communities. In 2004, she was awarded the Nobel Peace Prize while continuing to fight for the planet. 

   David Brower(1912~2000)

David Brower was associated with wilderness preservation. He became the Sierra Club's first executive director in 1952, then, over the next 17 years, the club membership grew from 2. 000 to77, 000. It won many environmental victories under his leadership. After leaving the club, he went on to found other environmental groups like Friends of the Earth, and the Earth Island Institute.