氯化钡有巨毒,致死剂量为8克,万一不慎服用,应吞服鸡蛋白解毒,并

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问题选择题

氯化钡有巨毒,致死剂量为8克,万一不慎服用,应吞服鸡蛋白解毒,并加服一定量的解毒剂,此解毒剂是 [ ]

A.AgNO₃

B.CuSO₄

C.Na₂CO₃

D.MgSO₄

答案

答案：D

句型转换

句型转换。

1. This is my sister's room. (改为否定句)

This ________ ________ my sister's room.

2. There are some apples on the tree. (改为一般疑问句)

________ there ________ apples on the tree?

3. Those are some English books. (改为单数形式)

________ English ________.

4. They are my parents. (改为同义句)

They are my ________ and ________.

5. Her hat is behind the chair. (对画线部分提问)

________ ________ her hat?

问答题简答题

什么叫渐减性故障率？