出自:川北医学院口腔医学院

表示机器或部件外形轮廓的大小,即总长、总宽和总高的尺寸是( )。
·规格(性能)尺寸
·装配尺寸
·安装尺寸
·外形尺寸
在孔或轴的基本尺寸后面,既注出基本偏差代号和公差等级,又同时注出上、下偏差数值,这种标注形式用于( )零件图上。
·成批生产
·单件或小批量生产
·生产批量不定
零线是表示( )的一条直线。
·最大极限尺寸
·最小极限尺寸
·基本尺寸
·实际尺寸
零件图上标注尺寸Sф20,表示该件是( )。
·圆柱
·圆锥
·圆球
·圆环
表示将部件安装到机器上或将整个机器安装到基座上所需的尺寸是( )。
·规格(性能)尺寸
·装配尺寸
·安装尺寸
·外形尺寸
孔、轴构成过盈配合时,孔的公差带位于轴的公差带( )。
·之上
·之下
·交叉重叠
.零件上有配合要求或有相对运动的表面,粗糙度参数值( )。
·要大
·要小
·不确定
·不受影响
基本偏差确定公差带的( )。
·大小
·位置
·形状
锥销孔ф5,其中ф5是与锥销孔相配的圆锥销( )。
·大头
·小头
·中间
·平均
在装配图中,对于紧固件以及轴、键、销等,若按( )剖切,且剖切平面通过其对称平面或轴线时,这些零件均按不剖绘制。
·横向
·纵向
·垂直于轴线方向
·侧向
两个零件在同一方向上只能有( )个接触面和配合面。
·二
·一
·三
·四
表示零件之间装配关系的尺寸是( )。
·规格(性能)尺寸
·装配尺寸
·安装尺寸
·外形尺寸
在装配图中,为了表示与本部件的装配关系,但又不属于本部件的其他相邻零、部件时,可采用( )。
·夸大画法
·假想画法
·展开画法
·缩小画法
机器或部件在工作时,由于受到冲击或振动,一些紧固件可能产生松动现象,因此在某些装置中需要采用( )结构。
·密封
·防松
·紧固
·压紧
关于机械制图,下列说法正确的是( )。
·主视图反映了物体的上、下和前、后位置关系。
·俯视图反映了物体的前、后和左、右位置关系。
·斜二测图,三个轴向伸缩系数相等。
·技术要求里面的字体可以随意用。
极限与配合在装配图上的标注形式中,分子为( )。
·孔的公差带代号
·轴的公差带代号
·孔的实际尺寸
( )是制造和检验零件的依据。
·零件图
·装配图
·轴测图
·三视图
.表面结构常用的轮廓参数中,高度参数Ra表示( )。
·算术平均偏差
·轮廓的最大高度
·轮廓微观不平度十点高度
( )表示零件的结构形状、大小和有关技术要求。
·零件图
·装配图
·展开图
·轴测图
基轴制中的基准轴的基本偏差代号为( )
·h
·H
·A
·a
在孔或轴的基本尺寸后面,注出基本偏差代号和公差等级,这种标注形式用于( ) 的零件图上。
·成批生产
·单件或小批量生产
·生产批量不定
在满足使用要求的前提下,应尽量选用( )的粗糙度参数值。
·较大
·较小
·不变
·常用
标准公差确定公差带的( )。
·大小
·位置
·形状
在装配图中,每种零件或部件只编( )个序号。
·一
·二
·三
·四
在装配图中,两个零件的非接触面画( )条轮廓线。
·2
·3
·4
·1
角度尺寸在标注时,文字一律()书写。
·水平
·垂直
·倾斜
·向下
Don’t forget to feed the birds for me while I am away, ____________
·cayou
·do you
·shall you
·will you
He said she must have beeout of towfor weeks; otherwise he ____________ her ioffice.
·would see
·should see
·must have seen
·would have seen
– It seems to be clearing up. –.
·No, not at all
·No hurry
·Never mind
·I hope so
I hope we _______the documents ready before you come tomorrow.
·will get
·get
·have get
·will have got
The teacher said that the moo_______ round the earth.
·was moving
·moved
·would move
·moves
We ______each other agaisince we graduated from the college.
·hadn’t seen
·didn’t see
·don’t see
·haven’t seen
It’s essential that the applicatioform ____________ out before the deadline.
·must be sent
·was sent
·be sent
·would be sent
He made no _______to hide his disappointment.
·effect
·affect
·effort
·afford
– What’s the temperature today –.
·Nice and cool
·The weather forecast says it’s fine
·About 18 degrees
·Sure, it’s sunny
– The radio announcer says the storm is getting nearer. – Well,.
·it’s not to my taste
·it’s too sunny
·just take his statement with a pinch of salt
·the more, the better
A spokesmasaid: “We have no comment _______ the publicatioof these photographs.”
·regarded
·regard
·regarding
·to regard
Mike will enter the competition, so ________his brother.
·does
·is
·will
·be
The ability to tolerate paivaries ______ perso______ person.
·betwee… and
·both … and
·from … to
·of … to
WheI arrived iLondon, it _______
·has beeraining
·rained
·was raining
·has rained
The directors have a meeting oFriday ____________ there is nothing to discuss.
·so long as
·unless
·so that
·because
Though he left the motherland since he was born, he caspeak ____________ French.
·smooth
·fluent
·easy
·flowing
– Cold day, isn’t it –.
·Yes, it’s warm and sunny
·Yes, it’s freezing
·There’s nothing special
·No one knows
We couldn.t afford _____ a new refrigerator.
·buy
·to buy
·buying
·bought
Since theI.ve lived alone and immersed myself ______ my career.
·at
·in
·to
·for
So far we ______ the first two chapters.
·had overviewed
·have overviewed
·overviewed
·overview
I am quite willing to help and _______ are the others.
·also
·so
·/
·hence
– Do you accept credit card or check –
·No, I can’t.
·Both will do.
·It is a problem.
·No, you can’t.
– Do you like this one It’s osale. –
·It is expensive.
·No, not very much
·I have no idea.
·Not really.
–We are going to have another heat wave. –!
·Oh, no
·I don’t
·No, we don’t
·No, you can’t
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