下列各句中没有语病的一项是 A．矗立在鲁迅纪念馆前的这座铜像，是由巴金等著名作家

根据句意和汉语注释，写出单词的正确形式。

1. Like many famous scientists, Li Siguang __________ (致力于) himself to the study of science.

2. __________ (医疗的) workers are badly needed in those earthquake-hit areas.

3. I don't think the watch gives you good __________ (价值) for your money.

4. The tourists had no ___________ (选择) but to wait for the next train.

5. How are you going to ___________ (证明) that it is very difficult for giant pandas to survive in the wild?

办公、操作场地消防规定是什么？

若多项式x²+mx+4能用完全平方公式分解因式，则m的值可以是 [ ]

A．4

B．﹣4

C．±2

D．±4

下图所示的变化中，属于化学变化的是

     

A．钟乳石的形成

B．制取食盐晶体

C．蒸发食盐水

D．用洗涤剂洗餐具

下列何项不属于行政赔偿的责任主体（）

A.行政机关

B.行政主体

C.国家

D.法律法规授权组织