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问题 选择题

下图是生物体内常见的一种生理作用图示，下列叙述错误的是

[ ]

A．a具有专一性

B．b成分可能是蛋白质

C．该过程只能发生在细胞内

D．反应完成后，a未发生改变

答案

答案：C

填空题

用括号中单词的适当形式填空。

1. Please be quick, or you       (be)late for the meeting.

2. The bus       (leave)when I got to the bus stop.

3. The dictionary must       (take)good care of.    

4. Either you or she        ( have) made a wrong decision.

5. Joanna received many        (gift) when graduating from middle school.

6. Alex is        (fourth) years old and is taken good care of in the kindergarten.

7. Whose school uniform is that on the chair, yours or       (his)?  

8. It was       (difficulty) for human beings to protect weather in the past.  

9. There is a beautiful       (paint)on the wall in each room of my house.  

10. You need to explain your opinions quite        (clear) when having a debate.
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单项选择题

下面关于列表框和组合框的叙述正确的是______。

A) 列表框和组合框可以包含一列或几列数据
B) 可以在列表框中输入新值，而组合框不能
C) 可以在组合框中输入新值，而列表框不能
D) 在列表框和组合框中均可以输入新值
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