探伤面上涂敷耦合剂的主要目的是()A、防止探头磨损 B、消除探头与探测面之间的空气

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问题:

探伤面上涂敷耦合剂的主要目的是()

A、防止探头磨损

B、消除探头与探测面之间的空气

C、有利于探头滑动

D、防止工件生锈

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题型:单项选择题

阅读理解。

      One day Mr and Mrs Wilson and their children were going to begin their holiday, and they had to be at

the airport at eleven forty in the morning. "It'll take us half an hour to get there in the car," Mr Wilson said,

"so we all have to be ready by eleven o' clock. Nobody should be late."

      At ten minutes to eleven they were still all running around doing things, except Mrs Wilson. She was

sitting quietly on a chair in the garden enjoying the sun. Her husband and children were surprised that she

wasn't in a hurry. 

      When they sat in the car, Mrs Wilson said to them, "Well, I knew that this was going to happen, so

before I went to bed last night, I moved all the clocks ahead twenty minutes. So now we can go to the

airport quietly without worrying about being late."

根据短文内容,判断下列句子的正误。正确的在括号中写“T”,错误的写“F”。

( )1. The Wilsons were busy getting ready for a holiday.

( )2. They would travel by air.

( )3. Their plane was going to take off at 11:40.

( )4. Mrs Wilson wasn't in a hurry because she knew there was enough time for them.

( )5. They were twenty minutes late for their plane.

题型:单项选择题

主动脉瓣关闭不全患者的脉搏是()。

A.细数脉

B.无脉

C.交替脉

D.水冲脉

E.奇脉

题型:单项选择题

按照能量转换的方式不同,常用压缩机可分为两大类()、(),其中往复式压缩机属(),离心式压缩机属()。

题型:单项选择题

1960年,美国麻省理工学院教授麦格雷戈在其所著《企业的人性面》一书中,将“经济人”概括为()

A.X理论

B.Y理论

C.Z理论

D.超Y理论

题型:单项选择题

集体土地使用权按照不同的用途,采用不同的方式向集体土地所有者原始取得。总的说来,包括以下()四种情况。

A.农地使用权

B.宅基地使用权

C.乡村公益用地使用权

D.乡镇企业用地使用权

E.未利用土地建设权

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