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问题 问答题

小轿车已成为平常百性代步工具．在寒冷的冬天，若人们坐在紧闭门窗的轿车内时，车前档风玻璃常会出现一层小水珠，使玻璃变得模糊，影响司机的视线，请你用所学的热学知识分析其产生的原因．

答案

答：寒冷的冬天室外温度很低，轿车内温度较高的水蒸气遇到温度较低的玻璃液化形成小水珠附着在玻璃上，因此玻璃变得模糊，影响司机的视线．

单项选择题

测定血清铁（ST）、血清铁蛋白（SF）、总铁结合力（TIBC）及转铁蛋白饱和度（TS）可了解机体铁代谢情况，缺铁性贫血时 （）

A.ST↓，SF↑，TIBC↓，TS↑

B.ST↑，SF↓，TIBC↑，TS↓，

C.ST↓，SF↓，TIBC↓，TS↑

D.ST↑，SF↑，TIBC↑，TS↑

E.ST↓，SF↓，TIBC↑，TS↓
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阅读理解
Reading comprehension.

    Personal computers and the Internet give people new choices about how to spend their time.
    Some may use this freedom to share less time with certain friends or family members, but new technology
will also let them stay in closer touch with those they care most about. I know this from personal experience.
    E-mail makes it easy to work at home, which is where I now spend most weekends and evenings. My
working hours aren't necessarily much shorter than they once were but I spend fewer of them at the office.
This lets me share more time with my young daughter than I might have if she'd been born before electronic
mail became such a practical tool.
    The Internet also makes it easy to share thoughts with a group of friends. Say you do something fun-see a
great movie perhaps-and there are four or five friends who might want to hear about it. If you call each one,
you may tire of telling the story.
     With E-mail, you just write one note about your experience, at your convenience, and address it to all the
friends you think might be interested. They can read your message when they have time, and read only as
much as they want to. They can reply at their convenience, and you can read what they have to say at your
convenience.
     E-mail is also an inexpensive way to stay in close touch with people who live far away. More than a few
parents use E-mail to keep in touch, even daily touch, with their children off at college.
     We just have to keep in mind that computers and the Internet offer another way of staying in touch. They
don't take the place of any of the old ways.

1. The purpose of this passage is to _____.
[ ]
A. explain how to use the Internet
B. describe the writer's joy of keeping up with the latest technology
C. tell the merits (价值) and usefulness of the Internet
D. introduce the reader to basic knowledge about personal computers and the Internet
2. The use of E-mail has made it possible for the writer to _____.
[ ]
A. spend less time working
B. have more free time with his child
C. work at home on weekends
D. work at a speed comfortable to him
3. According to the writer, E-mail has an obvious advantage over the telephone because E-mail helps one _____.
[ ]
A. reach a group of people at one time conveniently
B. keep one's communication as personal as possible
C. pass on much more information than the telephone
D. get in touch with one's friends faster than the telephone
4. The best title for this passage is _____.
[ ]
A. Computer: New Technological Advances
B. Internet: New Tool to Maintain Good Friendship
C. Computers Have Made Life Easier
D. Internet: a Convenient Tool for Communication
√
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