题目内容

据报道,2004年全球学习汉语的外国人约二千五百万,到2009年这一数字已经超过四千万。请你根据这一信息,以“More and More Foreigners Are Learning Chinese”为题, 用英语按以下要点为你们校报写一篇100-120个词的短文。

1. 描述以上有关外国人学汉语的信息;

2. 分析原因(如经济发展、文化交流……);

3. 简短评论。

注意:短文的标题已给出(不计词数)。

More and More Foreigners Are Learning Chinese

                                        

                                       

                                       

                                       

                                       

                                       

                                       

                                       

                                       

                                       

                                       

                                       

                                       

More and More Foreigners Are Learning Chinese

It is reported that in 2009, more than 40 million foreigners were learning Chinese, while in 2004, the figure was about 25 million. The change indicates that more and more foreigners are becoming interested in the Chinese language and culture.

There are some reasons for this change. For one thing, the past decades have witnessed the great economic achievements in China. China is playing a more important role in international affairs. Therefore, for many foreigners, speaking Chinese may bring more convenience. For another, the world is becoming a global village, which means a good command of Chinese is helpful in cultural exchange.

We can predict that the Chinese language and culture will continue to be popular in the coming years.


解析:

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Batteries can power 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 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.”

Kwon and his research team have been working on building a small nuclear battery, recently the size and thickness of a penny, intended to power various micro/nano-electromechanical systems (M/NEWS). Although nuclear batteries can cause concerns, Kwon said they are safe.

“People hear 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 (晶格结构) of the solid semiconductor, ” Kwon 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, Kwon 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. Kwon said that the battery could be thinner than the thickness of human hair.

Which of the following is true of Jae Kwon?

A. He teaches chemistry at MU.                 

B. He developed a chemical battery.

C. He is working on a nuclear energy source.     

D. He made a breakthrough in computer engineering.

Jae Kwon gave examples in Paragraph 4 ________.

A. to show chemical batteries are widely applied

B. to indicate nuclear batteries can be safely used

C. to describe a nuclear-powered system            

D. to introduce various energy sources.

Liquid semiconductor is used to ________ .

A. get rid of the radioactive waste             

B. test the power of nuclear batteries

C. decrease the size of nuclear batteries      

D. reduce the damage to lattice structure

According to Jae Kwon, his nuclear battery ________.

A. uses a solid semiconductor                        B. will soon replace the present ones

C. could be extremely thin                                D. has passed the final test

The text is most probably a ________.

A. science news report                                     B. book review

C. newspaper ad                                              D. science fiction story

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