属于工作强度类指标的是（） A.自然物理环境 B.设备责任 C.质量责任 D.肌肉紧

单词拼写。

根据下列句子及所给汉语注释，写出空缺处各单词的正确形式，每空只写一词。

1. The exercises are designed to ________ (增强) your stomach muscle.

2. Don't be frightened by the television camera. Just speak         (自然地).

3. The boy spoke in a low voice        (承认)that it was his fault.

4. Are you well __________(准备) for the entrance examination?

5. As the storm drew near, black clouds were __________ (聚集) over the sky.

6. However, his __________ (知识) of French remained very weak.

7.          (令人吃惊的是) , some graduates with qualification failed to find jobs.

8. The Bank of China has a lot of __________ (支行) in the world.

9. This kind of tree can only grow in the __________ (北方) parts of China.

10. Nuclear physics is ________(超出) my understanding.

毛果芸香碱激动M受体可引起（）。

A．支气管收缩

B．腺体分泌增加

C．胃肠道平滑肌收缩

D．皮肤粘膜、骨骼肌血管扩张

E．以上都是

反映经济的数量变化程度，通常是用()表示。

A．经济增长速度

B．经济增长率

C．经济发展速度

D．经济发展率

破开或打成的亚麻

褶皱内外曲率相同，等倾斜线等长的褶皱为（）。

A、等厚褶皱；

B、平行褶皱；

C、相似褶皱；

D、顶薄褶皱。