阀片升程大小对往复式压缩机有何影晌？如何调节？气阀弹簧力不一致有什么影响？

阅读理解。

    On 26th January，the biggest earthquake(地震)in India took the lives of 25，000 people. In the 

morning, when everybody was enjoying the holiday, the earthquake began. It was about 7.5 on the Ritcher scale. “There is nothing left between the sky and the earth any more. Everything has been pulled down , ”

said one of the villagers alive.“There is no water，no food and no one has come to help.”    

    Nobody died in Pakistan, a country next to India. The city of Lahore was lucky. In Lahore American

School, where I was studying , all of the students were sale. They were on the field，so most children

didn't feel anything. The earth quake was felt by the teachers that were on the second floor. However,

though Mrs. Young was also on the second floor , she didn't feel anything. She didn't know what

happened until a teacher told her about it. Those teachers who were on the other floors had different

feelings. Mr. Emond, the maths teacher from Australia , said that when the earthquake started he thought

there was something wrong with him , but then another teacher said that it was an earthquake. After those words Mr. Emond felt better. Mrs. Davis and Mr. Frost didn't feel anything either.

    My mother didn't feel anything. She didn't even know that it was an earthquake till she saw  a shaking (moving from side to side) light. My dad saw the computer shaking and then he looked out of the window and saw, many people going out.

1. People use "Ritcher scale" to tell __________.

A. where the earthquake takes place        

B. when the earthquake takes place        

C. how serious the earthquake is

D. how long the earthquake lasts

2. We learn that __________ from the sentence“There is nothing left between the sky and the earth any

more. ”

A. India is a large country        

B. the Indian people had nothing after the earthquake        

C. there is no tall buildings in India

D. the earthquake in India was serious

3. The city of Lahore is __________.

A. in India          

B. in America

C. in Pakistan

D. in Australia

4. Which is TRUE?

A. I was with my parents when the earthquake happened.

B. The earthquake in the city of Lahore wasn't serious.

C. People in the city of Lahore were frightened when they knew it was an earthquake.

D. The teachers in Lahore American School were afraid of the earthquake.

证券交易所应当与上市公司订立上市协议，以确定相互间的权利义务关系；同时，应当建立上市推荐人制度，保证上市公司符合上市要求。（）

由（）负责网点的现金出入库、网点柜员间现金调剂的交接手续及账务处理。

A、柜员

B、库管员

C、事后监督

D、委派会计

三幅图中，甲图为M地附近地区的平面图，乙图和丙图分别为过甲图相应的点作的地形剖面图。读图回答下列题。

在一次较大的降水过程中，降落在a地的水体在坡面上的流向是（）

A.东北向西南

B.东南向西北

C.西南向东北

D.西北向东南

关于井下防尘的措施，说法有误的是（）。

A.保证作业面足够的通风量

B.湿式凿岩

C.放炮后喷雾降尘5min

D.入风巷道、回风巷道设水幕