汽轮机启动过程中,在一阶临界转速以下,汽轮机振动不应超过0.05mm。

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问题:

汽轮机启动过程中,在一阶临界转速以下,汽轮机振动不应超过0.05mm。

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一段长为32米的篱笆围成一个一边靠墙的矩形菜园,墙长18米,问这个矩形的长、宽各为多少时,菜园的面积最大,最大面积是多少?

题型:判断题
阅读短文,按要求完成后面的任务。
阅读下列短文,根据短文中的信息完成文后表格。(每空一词)
Today, there are many problems between parents and children. Many people always ask, “ Why do we often argue(争论)?”
Parents show their love to children in different ways. They cook nice food, buy new clothes for them. They also care about their studies. Parents always ask “ You must work hard”,  “You should do your homework”, “Why not do homework for your exam?” all the time.
When children get bad marks, their parents get very angry. They stop their children watching TV, playing games or going outside until they are good at their studies.
Why? Most families have only one child. The child is the hope of the family, they want the child to be the best.
Many children want to do things themselves. They want to do many unusual things that parents dislike. They like pop music, basketball and other new things. They enjoy surfing on the Internet and playing QQ games. They spend a lot of time chatting online and listening to the QQ music. In their parents’ eyes, these are a waste of time. For these reasons, parents and children often argue.
_小题1:__ do Children and Their Parents Argue?
Reason
Parents want their child to be the__小题2:__
A. They __小题3:__ their children in different ways.
B. Their children should __小题4:__ hard all the time.
C. _小题5:__TV and playing games on the Internet are __小题6:__ for their studies.
Many children want to do many __小题7:_ things.
A. They like to sing pop __小题8:__, listen to the QQ music and other __小题9:__ things.
B. They usually spend a lot of time surfing on the Internet and playing QQ games, __小题10:__online with their friends.
 
题型:判断题

反渗透装臵的膜元件是否污染或结构,是通过检测()项目反映出来的。

A、给水电导率和产水电导率

B、产水电导率和浓水电到率

C、各段之间的压力或压差

D、给水Ph

题型:判断题

耗气型气动功率放大器是以()放大来实现功率放大的。

A.流量

B.压力

C.压差

D.A+B

题型:判断题

一架没有备降场的飞机,在到达目的地机场一小时前,机场能见度是3200米,一小时后到达目的地机场的能见度是().

A.3200米

B.4800或3200之间取最大值

C.4800

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