问题
单项选择题
在抗原抗体反应中由于抗体过多而出现对反应的抑制现象称为( )
A．亲和性
B．抑制性
C．前带现象
D．后带现象
E．解离现象
答案
参考答案：C
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在抗原抗体反应中由于抗体过多而出现对反应的抑制现象称为( )
A．亲和性
B．抑制性
C．前带现象
D．后带现象
E．解离现象
参考答案：C
| 阅读理解。 |
| Small children often laugh at the short ones or at someone who isn't dressed as well as they are. But as they grow up, they learn not to hurt other people's feelings by laughing at their problems. They learn to laugh at other things. Most important, they learn to laugh at themselves. Suppose you're playing a game. You make a mistake and lose. Do you become angry? Or can you laugh at yourself and hope to do better next time? Suppose you are at a special dinner. You at times spill some food. Why keep worrying about how clumsy you looked? Why not laugh it off and enjoy yourself any way? If you can, it's a good thing you've really grown up. |
| 1. This article is mostly about ______. |
[ ] |
| A. why laughter is good for your body B. what you should laugh at C. where you may laugh D. where you may laugh at |
| 2. The writer says small children laugh at people who ______. |
[ ] |
| A. have problems B. not to be worried C. dress well D. play games |
| 3. The writer shows hot laughter could help you ______. |
[ ] |
| A. not to spill food B. not to be worried C. not to enjoy yourself D. to grow up |
| 4. The most important thing is to learn how to laugh at ______. |
[ ] |
| A. jokes B. pictures C. children D. yourself |
| 5. The writer shows how laughter could help you no to ______. |
[ ] |
| A. make a mistake B. lose again C. become angry D. try again |