问题
单项选择题
体液补体抑制因子是（）
A.C1q
B.IgG1
C.IL-2
D.H因子
E.B因子
答案
参考答案：D
解析：H因子可以促进C3b的裂解。
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体液补体抑制因子是（）
A.C1q
B.IgG1
C.IL-2
D.H因子
E.B因子
参考答案：D
解析：H因子可以促进C3b的裂解。
| 阅读理解。 | ||
One day his mother forgets (忘记) to make the clock get ready to ring. And the next morning Tony doesn't get up at seven thirty. It's time for breakfast. Mother goes to see him. Tony is in bed and his eyes are open. "Why don't you get up?" His mother is angry. "I am waiting for the bell." | ||
| 1. Tony is _____. | ||
| A. six B. seven C. nine D. ten | ||
| 2. Tony's mother buys him a clock because _____. | ||
| A. he can't get up on time. B. the clock is good C. Tony likes it D. she wants to give her good son a present | ||
| 3. The clock rings at _____. A. 6:30 B. 7:15 C. 7:00 D. 7:30 | ||
| 4. That morning, _____. | ||
| A. Tony is ill B. the clock is broken C. the clock doesn't work D. Tony's mother forgets to make the clock ring. | ||
| 5. This article (文章) is _____. | ||
| A. a piece of news B. a joke C. an introduction D. a letter |
