油泵一般有三种类型（）、（）和（）。其中（）是最普遍的。

Every morning Steve went to work by train. As he has a long trip，he always buys newspaper. It helps make the time passing more quickly. One Tuesday morning，he turned over the sports page. He wanted to see the report about an important football match the night before. The report was so interesting that he forgot to get off at his station. He did not know it unless he saw the sea. He got off at the next station，but had to wait a long time for a train to go back. It was no doubt that he arrived late at the office. His boss was angry when Steve told to him why he was late.“Work is very important than football!” he shouted.

物体在平面镜里成的是_______像（选填“实”或“虚”）。若一个身高为1.7m的人站在平面镜前3m处，此时像高为______m，若他向镜子方向走1m，则他与像之间为________m，像的大小将______。

施工单位承担违约责任的常用方法是( )。

A．支付违约赔偿金

B．赔偿损失

C．赔礼道歉

D．没收定金

瓶颈产业属于( )分类法的分类产业。

A．三次产业

B．联合国产业

C．资源集约度产业

D．战略关联产业

气测录井