因为毛坯表面的重复定位精度差,所以粗基准一般只能使用一次。

题型:判断题

问题:

因为毛坯表面的重复定位精度差,所以粗基准一般只能使用一次。

考点:机械检查工机械检查工(初级)机械检查工(初级)题库
题型:判断题

阅读理解。

     Have you ever complained why life is so tiring? Does the sky sometimes seem dark to you? Are your

studies sometimes not successful? Well, friends, cheer up and smile all the time. If you see the world with

your warm heart, you'll find that the whole world smiles to you.

     While in school, sometimes you are tired of your lessons, but have you ever noticed the happy smile on

your teacher's face when you did a good job?

     One day it is fine. Just before you want to go out, it suddenly starts to rain. Maybe you would feel very

sad and start complaining about the weather. But dear friends, why don't you sit down and listen to the free

concert that the nature offers you? And with the timely (及时的) rain, crops in the fields will grow better

and better and farmers will have a food harvest. 

     Although everyone wants to succeed in what he tries to do, sometimes failure (失败) can't be avoided

(避免). I think failure is not terrible and the terrible thing is that we are afraid of it and give up hope. When

we face failure, we must be confident in ourselves, draw a useful lesson from it and try our best to finish

what we have decided to do. As a popular saying goes, "Failure is the mother of success."

     Attitude (态度) decides everything. With an optimistic (乐观的) attitude life is easy and pleasant. Let's

smile to whatever we meet and the whole world will smile to us.

1.People sometimes complain ______.[ ]

A.the sky is always dark

B.their studies are successful

C.they see the world with their heart

D.life is tiring

2.According to the passage, in school, ______. [ ]

A.the students don't like their 1essons

B.the teachers will be happy if the students do good jobs

C.the teachers don't like their teaching

D.the teachers are tired of their work

3.If there is a timely rain, ______. [ ]

A.you want to go out

B.you can listen to a concert

C.crops in the fields will grow better

D.farmers can't have a good harvest

4.When we face failure, we ______. [ ]

A.must be confident in ourselves

B.shouldn't be afraid of

C.shouldn't give up hope

D.all of the above

5.The best title of this passage is ______.[ ]

A.Smile and the World Smiles to You

B.Complaining about life

C.Fai lure I s the Mother of Success

D.It is Very Hard to Succeed

题型:判断题

根据温度、热量、内能的关系,下列说法正确的是(  )

A.温度高的物体含有的热量多

B.物体温度升高,一定吸了热

C.0℃的冰没有内能

D.物体温度升高,内能一定增加

题型:判断题

意识障碍常见的表现除外()。

A.眩晕

B.嗜睡

C.昏睡

D.谵妄

E.昏迷

题型:判断题

某月内,X商品的替代品的价格上升和互补商品的价格上升分别引起X商品的需求量变动50单位和80单位,则在它们的共同作用下该月X商品的需求量( )。

A.增加30单位
B.减少30单位
C.增加130单位
D.减少130单位

题型:判断题

精馏塔的操作和塔效率的测定:如果在实验过程中,实验室里有较浓的乙醇气味,试分析原因?

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