儿童坐高占身高的比例随年龄变化的趋势是（）。 A.增高 B.降低

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问题单项选择题

儿童坐高占身高的比例随年龄变化的趋势是（）。

A.增高

B.降低

C.一直不变

D.出生时坐高占身高的比例为40％，4岁为60％，10岁为54％，发展无规律

E.当儿童患克汀病时，坐高占身高百分比明显减小

答案

参考答案：B

改错题

单句改错。

1. They had to return from the hiking in the desert, for their food almost ran out of.

2. We are totally opposed to make any changes in the plan.

3. You are absolute right. It is our responsibility to stop all illegal activities.

4. Nobody knew how the traffic accident came out the day before yesterday.

5. What would have happened if Bob walked farther, as far as the river bank?

6. English speakers also enjoy Tang poems from China for particular.

7. Do not to be disappoint if you have to try several times before you stop smoking.

8. Comparing with most of the women at that time, she was lucky.

9. Large quantities of energy from the sun is being taken with modern equipment.

10. China has five years of steadily economic growth.

多项选择题

与实在社区相比，虚拟社区具有哪些特征：（）。

A.交往的超时空性

B.人际互动具有匿名性和彻底的符号性

C.人际关系较为松散

D.社区群体的流动较为频繁

E.自由、平等、民主、自治和共享的交往准则