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问题 单项选择题 A1型题

关于急性细菌性痢疾形成的假膜，下列错误的是（）

A.假膜形成是急性细菌性痢疾的特征性病变

B.首先出现在黏膜皱襞的顶部，随病变扩展融合成片

C.假膜脱落后一般易形成深达肌层或浆膜层的溃疡

D.肉眼观呈灰白色或暗红色

E.大便中偶见片状假膜

答案

参考答案：C

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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判断题

当运用不同种类的K线组合得到的结论不同时，应尽量使用根数多的K线组合的结论。( )
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