地面测量一般包括（） A.测绘采掘工程图 B.测绘地形图 C.地面控制测量 D.地面

采用过氧乙浸泡进行排泄物消毒时，恰当的浸泡时间为（）

A.5分钟

B.20分钟

C.30分钟

D.1小时

E.2～4小时

下列哪项不是超声对胃检查的主要目的（）。

A.早期胃癌的诊断

B.胃癌的分期

C.胃石及异物的确诊

D.胃壁结构的观察

E.胃排空与蠕动的观察

　A man named Smith was sitting on his roof during a flood, and the water was up to his feet. Before long a fellow in a canoe passed and shouted, "Can I give you a lift to higher ground?"

　　"No, thanks," said Smith. "I have faith in God and he will save me."

　　Soon the water rose to Smith's waist. At this point a motor boat pulled up and someone called out, "Can I give you a lift to higher ground?"

　　"No, thanks, I have faith in God and he will save me."

　　Later a helicopter flew by, and Smith was now standing on the roof with water up to his neck. "Grab the rope, "shouted the pilot. "I'll pull you up."

　　"No, thanks," said Smith. "I have faith in God and he will save me. "But after hours of struggling with water, poor exhausted Smith drowned and went to his reward. As he arrived at the Pearly Gates, Smith met God and complained about this. "Tell me, God, "he said, "I had such faith in you to save me and you let me drown. What happened?"

　　To which God replied, "What do you want from me? I sent you two boats and a helicopter."

　小题1:When the pilot asked Smith to grab the rope, ______.

A．Smith pulled the pilot up

B．Smith did so

C．Smith didn't do so

D．Smith didn't hear him小题2:At last, poor exhausted Smith drowned and ______.

A．went to his reward

B．passed away

C．went to heaven

D．all of the above　小题3:What do we know about Smith? ______.

　　　　A. He was a lazy man

　　　　B. He was a lucky man who believed in God

　　　　C. He was a poor man

小题4:What do you think of this passage? This passage is very ______.

　　　　A. moving　　　　B. humorous　　　C. depressing　　　D. surprising

　　　　　D. He was a silly man who believed in God

气体A由C、H、F、S中的三种元素组成，将标准状况下2.80L气体A在过量的O₂中完全燃烧后恢复到原状态，放出62.50kJ的热量．已知气体生成物通入过量的Ca（OH）₂溶液后无剩余，得到17.38g沉淀．再取相同条件下的2.80L气体A装入一个薄膜袋中，袋和气体的总质量4.50g（已知CaSO₃，CaF₂，CaCO₃难溶于水，HF难电离）．

（1）根据上述数据计算，A的相对分子质量不会大于______，由此可知，组成A的三种元素为______，化学式为______．

（2）写出生成17.38g沉淀时，发生反应的离子方程式______．

（3）薄膜袋的质量为______．

（4）写出该条件下A在O₂中燃烧的热化学方程式______．

变压器钟罩（器身）吊装过程（）与箱壁间应保持一定的间隙，以免碰伤器身。

A.高压侧引线

B.低压侧引线

C.金属管道

D.分接开关支架