In the context of this passage, "secondhand smoke" may mean

A．smoking bad-quality cigars.

B．smoking very cheap cigars.

C．being near cigar smokers when they are not smoking.

D．being near cigar smokers when they are smoking.

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参考答案

答案解析

语义理解题。题目问的是“secondhand smoke”的意思，其实是一个词汇题，要求理解这个短语在本篇文章中的含义。secondhand smoke的意思是“二手烟”，也就是我们说的被动吸烟。比较几个选项，A选项说“抽质量差的雪茄”，显然不是这个意思。B选项说“抽便宜的雪茄”，也不是这个意思。C选项说“当抽烟者不吸烟的时候，在其附近”，这样就没有所谓的二手烟了。其实应该是，当你在一个吸烟者的附近，而且他此时正在吸烟，这个时候你就会被动吸烟，吸N-手烟，这对人来说是非常有害的。本题答案为D选项。

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1 请根据短文内容，回答题。

Batteries Built by Viruses

What do chicken pox, the common cold, the flu, and AIDS have in common? They're all disease caused by viruses, tiny microorganisms that can pass from person to person. It's no wonder that when most people think about viruses, finding ways to steer clear of viruses is what's on people's minds.
Not everyone runs from the tiny disease carriers, though. In Cambridge, Massachusetts,scientists have discovered that some viruses can be helpful in an unusual way. They are putting viruses to work, teaching them to build some of the world's smallest rechargeable batteries.
Viruses and batteries may seem like an unusual pair, but they're not so strange for engineer Angela Belcher, who first came up with5 the idea. At the Massachusetts Institute of Technology (MIT) in Cambridge, she and her collaborators bring together different areas of science in new ways. In the case of the virus-built batteries, the scientists combine what they know about biology, technology and production techniques.
Belcher's team includes Paula Hammond, who helps put together the tiny batteries, and Yet-Ming Chiang, an expert on how to store energy in the form of a battery. "We're working on things we traditionally don't associate with nature," says Hammond.
Many batteries are already pretty small. You can hold A, C and D batteries6 in your hand. The coin-like batteries that power watches are often smaller than a penny. However, every year, new electronic devices like personal music players or cell phones get smaller than the year before. As these devices shrink, ordinary bakeries won't be small enough to fit inside.
The ideal battery will store a lot of energy in a small package. Right now, Belcher's model battery, a metallic disk completely built by viruses, looks like a regular watch battery. But inside, its components are very small-so tiny you can only see them with a powerful microscope.
How small are these battery parts? To get some idea of the size, pluck one hair from your head.
Place your hair on a piece of white paper and try to see how wide your hair is-pretty thin, right?
Although the width of each person's hair is a bit different, you could probably fit about 10 of these virus-built battery parts, side to side, across one hair. These microbatteries may change the way we look at viruses?.
According to the first paragraph people try to

A．kill microorganisms related to chicken pox, the flu, etc.

B．keep themselves away from viruses because they are invisible.

C．stay away from viruses because they are causes of various diseases.

D．cure themselves of virus-related diseases by taking medicines.

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2 What is Belcher's team doing at present?

A．It is finding ways to get rid of viruses.

B．It is mass-producing microbatteries.

C．It is making batteries with viruses.

D．It is analyzing virus genes.

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3 What expression below is opposite in meaning to the word "shrink" appearing in paragraph 5 ?

A．Broaden.

B．Spread.

C．Extend.

D．Expand.

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