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问题 单项选择题

形状比较复杂的工程形体，一般可以把它看作由若干个简单的基本几何体通过叠合、相交或切割等方法组合而成。这种将工程形体分解成基本几何体组成的方法，称为（）

A.形体组合

B.形体拆分

C.形体分析

D.形体简化

答案

参考答案：C

填空题

用动词的正确时态填空。

1. I _____ ( talk). You _____ (listen) to me now.

2. Look, the boy _____ (run) fast.

3. — What are you doing? 

    — I _____ (do) my homework. 

4. — _____ the students _____ (read) English?

    — Yes,they are.

5. Tom _____ (not study) English. He is studying Chinese.

6. — Who _____ (sing) a song? 

    — Li Ying is.

7. The girl _____ (not eat) bananas now.

8. — Where _____ they _____ (stand)?

    — They are standing over there.

9. Look! The boy over there _____ (play) a model plane.

10. — What is Meimei doing now? 

      — She _____ (watch) TV with her parents.

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单项选择题

创伤后应激障碍的特点不包括（）

A.应激源往往具有异常惊恐或灾难性质

B.症状常有晨重夜轻的节律变化

C.反复重现创伤性体验

D.可以出现分离症状

E.发病常在遭受创伤后数日至半年内出现
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