A cellphone is one of the few things that we hold close to our faces all the time, and yet it could possibly explode - this is what made the recent Samsung’s Galaxy Note 7 smart-phone accidents so sh 题目和参考答案——青夏教育精英家教网—

题目内容

A cellphone is one of the few things that we hold close to our faces all the time, and yet it could possibly explode - this is what made the recent Samsung’s Galaxy Note 7 smart-phone accidents so shocking.

According to technology news website The Verge, flawed（有瑕疵的）phone batteries might be to blame.

Even if you are not a science student, you probably know that it is common sense that the anode (the negative（负的）end of the battery) and the cathode (the positive end) should never touch. If they do, the battery will short-circuit（短路）, causing a powerful electrical reaction that can destroy the battery and cause a fire.

This is why all lithium-ion（锂离子）batteries - the kind that can be found in many of our devices like tablets and cameras - have a separator layer inside to stop the two ends from touching one another.

But somehow, the separators in some of the Samsung phones broke, causing explosions.

Overcharging is another problem that can make batteries heat up quickly. Fortunately, most batteries are designed to be able to automatically stop charging once they are fully charged. But again, this somehow failed to happen in some of the Samsung phones.

The two “somehows” may sound random（随机的）and hard to explain. But they actually both come from the fact that phone producers have been pushing the limits of batteries to meet customers’ demand for a longer battery life.

According to Lynden Archer, a materials scientist at Cornell University, US, we have already achieved 90 percent of the battery life possible from a lithium-ion battery. Customers’ demand that their devices get thinner has also given producers little choice but to try to put more power into thinner batteries.

“The more energy you put into a box, the more dangerous it’s going to be,” Billy Wu, a lecturer at Imperial College London, told The Guardian.

A thinner battery also means producers have to use thinner material for separators, and thinner material has more chance of breaking.

1.A separator layer is put in lithium-ion batteries in order to ___________.

A. ensure a longer battery life

B. prevent a battery from short circuiting

C. connect the anode and the cathode

D. reduce a certain electrical reaction

2.What are the direct reasons for the Samsung phone explosions?

A. Short circuiting and overheating

B. Pushing the limits of batteries

C. Overcharging and thinner batteries

D. Automatic charging and broken separators

3.Lynden Archer’s comments indicate that ___________.

A. demands for thinner cellphones are unreasonable

B. lithium-ion batteries can’t hold much more power than that they do now

C. producers can use 10 percent of a lithium-ion battery

D. new material for batteries is needed to meet consumers’ demands

4.What is the writer’s main purpose of writing the article?

A. To describe problems facing cellphone producers

B. To explain the reasons for the Samsung phone explosions

C. To teach us common sense when it comes to batteries

D. To warn us about the dangers of lithium-ion batteries

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Ways to make a great first impression

You’ve heard it a million times already, but it really does take but a few seconds to make that all-important first impression (印象). Here are some easy ways for you to impress your classmates or teachers.

● 1.

Before you shake hands with somebody, make sure that your hands are clean. The handshake should not be too strong or weak. Most people use their right hands, unless they have a reason to use the left. 2.

● Be on time

When meeting someone for the first time, arriving on time is as important as breathing. You may have an excuse, but that will leave the person who hardly knows you with a bad impression. 3. It’s better to be hanging around the place than be stuck in traffic.

● Introduce yourself and ask for names

Make sure you properly introduce yourself. Ask for their name in a polite way. 4. This will increase the chances of their remembering your name in the future. Always remember to stand up when greeting someone and be sure to introduce them to anyone you’re with.

● Make good conversation

To get the most out of your discussion, try to find something common between the two of you. 5. A person will feel more comfortable with someone they can relate to (产生共鸣).

A. You’ll be in serious trouble if you leave them with a bad impression.

B. However, don’t have your left hand in your pocket because this appears impolite.

C. Use body language

D. Have a proper handshake

E. Repeat the name and use it later in conversation.

F. As a general rule, plan to arrive about 30 minutes early.

G. It could be a similar taste in clothes or a common hobby.

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以下作文。文中共有10处语言错误，每句最多有两处。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（＼）划掉。

修改：在错的词下划一横线，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。

Getting rid of the bad habit of procrastination(拖延症)is now my goal in life. My first step was to set small targets what can be reached realistically. For example, I plan to set a timetable for my study. So after school, I will put finishing homework in the last place. Additionally, I will make a list of my important task including their due dates but follow my schedule strictly. I will avoid find excuses for putting them off. At same time, I will ask for my friends and parents to help me. By achieving this small targets, I have confident that I will overcome procrastination.

1.他出了一次车祸，结果只得在医院里躺了整整一个月。

2.人们意见分歧很大，结果，讨论一无所获。

3.你还知道那些其他濒临灭绝的物种吗？

4.我相信你对动植物逐渐消亡很关心。

5.他以他的爸爸是一位著名的科学家而自豪。

6.戴西急忙穿戴起来，她穿好牛仔裤和毛衣。

7.我们的毛皮用来制作像你穿的那种毛衣。

8.她很快就适应了那里的天气。

9.即使游客喜欢看到我们，他们还是不想保护我们。

10.尽管我有些观点跟他不同，我喜欢与他一起干活。

11.旅游公司提出申请，希望做有偿捕猎，这样农民就可以赚很多钱。

12.我们的航班被推迟，这意味着我们要在机场等待4个小时。

13.我们能做些什么来保护麋鹿，使他们不会再次消失？

14.你认为中国的熊猫正处在危险中吗？

15.请你建议我们应该做些什么来保护野生动植物你呢?

16.你知道恐龙为什么在大约65万年前突然灭绝了？

17.国家自然保护区不应该向旅游者开放。你同意吗？

18.人们相信，总有一天会有足够多的动物再次在野外生活。

19.给熊猫造一个新家的项目正在开发中。

20.从现在起，我将更加关注野生动植物的保护。

21.当你被问到难题的时候，你应该怎么做？

22.这药物对那个病人立即起了作用。

23.我午饭更喜欢吃蛋糕，不喜欢吃面条。

假如你是李华。你的朋友Tommy是一个手机低头族，无论站着、坐着、走着，他都在低头玩手机。请就此给Tommy写一封信，说服他改掉这个坏习惯。

注意：1．词数100左右；

2．可适当增加细节，以使行文连贯；

3．开头语和结尾语已给出，不计入总词数。

参考词汇：过度使用overuse

Dear Tommy,

There are many people now playing with their cell phones no matter where they are. And I know you are not an exception.

____________________________________________________________________________________________

______________________________________________________________________

Yours,

Li Hua

此题要求改正所给短文中的错误。短文中有10处错误，每句中最多有两处。错误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：在错的词下划一横线，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.

When I was a child, I hoped to live in the city. I think I would be happy there. Now I am living in a city , but I miss my home in countryside. There the air is clean or the mountains are green. Unfortunately, on the development of industrialization, the environment has been polluted. Lots of studies have been shown that global warming has already become a very seriously problem. The airs we breathe in is getting dirtier and dirtier. Much rare animals are dying out . We must found ways to protect your environment. If we fail to do so , we’ll live to regret it .

People tend to become more personal and hide less of themselves when using email. Researchers from Open University in Britain have found in a recent study that there are good reasons for this.

The team of researchers asked 83 pairs of students, all strangers to each other, to solve a problem. They had to discuss this question: If only five people in the world could be saved from a world disaster, who should they be? The pairs of students had to talk over the problem either face to face or by computers. Dr. Johnson said, “They told their partners four times as much about themselves when they talked over the Internet as when they talked face to face. When the computers were fitted with cameras so that students could see each other, this limited the personal side of the conversation.”

Generally the information was not extremely personal. It was mainly about things such as where they went to school, or where they used to live. But some students discussed their love stories, and personal childhood experiences.

Dr Johnson believes that emailing encourages people to focus on themselves. And when they do this, they become more open, especially if there are no cameras. “If you cannot see the other person, it becomes easier to talk about yourself. This is because you are not thinking what the other person is thinking of you. So emailing has become the modern way of talking,” said Dr. Johnson. However, this style of talking is not entirely new. “In the 19th century people started to use the ‘telegraph’ to communicate. Now the same kind of thing has happened and people ended up speaking more freely.”

Dr. Johnson thinks that emailers need to know about these effects of emailing, especially when they start work in a company. “ If you don’t know about them, you could find yourself saying more about yourself than you wanted to.”

1.The subject discussed in this passage is _______.

A. how people do research studies

B. how people open up when emailing

C. how to communicate at work

D. how to discuss and solve a problem

2.The reason that some couples talked freely about themselves is that _______.

A. they didn’t talk about very personal things

B. they couldn’t see each other

C. the cameras on the computers were turned on

D. they had to discuss a question

3.In the writer’s opinion, one should ______.

A. focus on oneself when emailing

B. talk more freely in emails than usual

C. consider how one uses email at work

D. discuss any subject that one wants to

Many foreign students report feeling lonely or unwelcome in Australia. Those feelings are among the reasons why Australia is taking a close look at its international education industry. But wherever international students go, making friends may not always be easy. Elisabeth Gareis of Baruch College in New York surveyed 454 international students. They were attending four-year colleges and graduate schools in the American South and Northeast.

Students from English-speaking countries and from northern and central Europe were more likely to be happy with their friendships. But 38% of the international students said they had no close friends in the United States. And half of the students from East Asia said they were unhappy with the number of American friends they had. Thirty percent said they wished their friendships could be deeper and more meaningful.

Professor Gareis says, “Students from East Asia have cultures that are different on many levels from the culture in the United States. There are also language problems, and maybe some social skills, such as small talk, which are possibly not as important in their native countries, where it's not as important to start friendships with small talks. Many East Asian students blamed themselves for their limited friendships with Americans, for not speaking the language well enough and for not knowing the culture well enough.

VOA's Student Union blogger Jessica Stahl did her own survey to find out how American students and foreign students relate to each other. More than 100 students, about half of them American, answered her online questions.

Half of the international students and 60% of the Americans said they related as well or better to the other group than to their own group.

Professor Gareis says: "International students who make friends with host nationals are, overall, more satisfied with their stay in the host country. They have better language skills, they have better academic performance and they have better attitudes toward the host country."

1.What can be the best title for the text?

A. Making Friends Is Not Always Easy for Foreign Students

B. Students from East Asia Are Not Good at Making Friends

C. International Education Industry in Australia and America

D. The Relation between Foreign Students and Host Countries

2.Professor Gareis tends to think that ___________.

A. culture shock should be blamed for many levels of American culture

B. foreign students don’t know small talks mean a lot to Americans

C. foreign students should learn some basic social skills first of all

D. foreign students have difficulty making friends for different reasons

3.How did Jessica Stahl carry out her survey?

A. By doing questionnaires from Students Union

B. By asking questions on the Internet

C. By forming the students into groups

D. By doing a survey through VOA

4.Which of the following statements will the writer probably agree with?

A. International students like to make more friends in their own group

B. International students are more likely to remain in the host country after graduation

C. Students who make more friends at home have better academic performance

D. Students who make friends in their host countries feel happier with their experience

London Underground

The world's first subway was built in London in 1863. At the time, the government was looking for a way to reduce traffic problems in the city of London. The poor areas of the city were so crowded with people that it was almost impossible for horse carriages to get through. The city officials were interested in trying to make it possible for workers to live outside of London and travel easily to work each day. If people had a cheap and convenient way that they could depend on to go to and from work, they would relocate their homes outside of the city. This would help ease(减轻) the pressure of too many people living in the poor parts of London. From these problems, the idea of the London Underground, the first subway system, was born.

The plans for building the Underground met with several problems and delays, but the fast track was finally opened in January 1863. A steam train pulled the cars along the fast underground track which was 6 kilometers (3.7 miles) long. About 30,000 people got on the subway the first day. Riders were treated to comfortable seats (standing up while the train was moving was not allowed), and pleasant decorations inside each of the cars. However, the smoke from the engine soon filled the air in the tunnels with ash and soot(煤灰), as well as chemical gases. Fans had to be put in the tunnels later to keep the air clean enough for people to breathe. Even with its problems, riding in the Underground did catch on. It carried 9 million riders in its first year.

1.What led the British government to build the London Underground?

A. Traffic jams and pollution.

B. Population and pollution.

C. Overcrowding and traffic jams.

D. The poverty and subway problems.

2.How did the London Underground solve the smoke problem?

A. It made the tunnels larger.

B. It put fans in the tunnels.

C. It cleaned the chemical gases in the tunnels.

D. It reduced the number of passengers riding in the train.

3.The underlined phrase “catch on” most probably means “ ”.

A. be troublesome

B. become popular and fashionable

C. keep up with

D. seize

4.Which of the following is TRUE?

A. To relocate the workers' homes outside London, the government built the subway.

B. There were so many problems and delays that in 18th century the first subway opened.

C. The subway greatly eased the pressure of traffic.

D. There were not enough seats for the passengers the first day the subway opened.

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