出自:佳木斯大学语言治疗学

Three-fourths of the surface of the earth _____ sea.
·is
·have been
·are
·was
Why! I have nothing to confess. ____________ you want me to say
·What is it that
·What it is that
·How is it that
·How it is that
Sometimes it was a bit boring to work there because there wasn’t always ____________ much to do.
·such
·that
·more
·very
---Would you like to go for a picnic with us tomorrow --- Of course, I ____________.
·would
·would like
·would like to
·wouldn’t like
The chairmathought ____________ necessary to invite Professor Smith to speak at the meeting.
·that
·it
·this
·him
The apartment is really too small, but it’s ____________ for the time being.
·tolerable
·tolerant
·intolerable
·intolerant
Wome____________ going out without a veil.
·are forbiddefrom
·are forbade from
·are forbiddeto
·are forbade to
It is good for you to have such a good chance to study abroad, but it remains ____________ whether you careally learsomething useful.
·to be seen
·to see
·seen
·seeing
____________ fire, sound the alarm and leave the building immediately.
·Ineed of
·Icase of
·Ispite of
·Icharge of
Never before ____________ igreater need of moderpublic transport thait is today.
·has this city been
·this city has been
·was this city
·this city was
– You will come here otime, won’t you–.
·Certainly, I will.
·Yes, it’s true.
·Yes, it is no doubt.
·Yes, I do.
Mary is always complaining ____________ something.
·with
·for
·about
·of
“It is a ____________ moment.” he told journalists.
·historian
·historical
·history
·historic
– Will they go for a picnic today– _________________
·Yes, perfectly.
·Yes, it is.
·Well, it depends.
·Not at all.
I cannot concentrate ____________ anything wheI am hungry.
·on
·with
·at
·in
____________ his homework, he went to watch TV.
·Having finished
·Finished
·Finishing
·To finish
With a ____________ smile, he went out of the room.
·content
·contented
·misery
·miserable
– He must be a top student ihis school.–
·I have doubt.
·There is no doubt about it.
·Yes. No doubt.
·It is not doubtful.
– How about going to see a film tonight–
·Oh, it couldn’t be better.
·Yes, I will go.
·Of course.
·Yes, I think so.
He feels that the media should be more ____________ iwhat they report.
·response
·responsible
·responsibly
·responsibility
The basic units of a computer system are as follows: _________ ( )
·CPU, memory and disk
·CPU, input and output unit
·CPU, memory and I/O system
·CPU, memory and ALU
Today, _________ cagive you a music synthesizer, a fax machine, a CD-ROM drive, ect. ( )
·input devices
·expansiocards
·output device
·joystick
The control unit fetches _________ from memory and decodes them. ( )
·data
·information
·results
·instructions
凡是夹具,其中一定有( )。
·对刀装置
·分度装置
·定位元件
·辅助元件
( )辅助支承既起定位作用,又可增加工件的刚度。
·正确
·错误
( )导轨副应采用不同材料,以提高其耐磨性,防止粘结磨损。
·正确
·错误
( )变速组中两级的传动比的比值称为级比。
·正确
·错误
( )封闭截面的刚度远远大于开口截面的刚度,特别是抗扭刚度。
·正确
·错误
( )安全离合器的作用是提供过载保护。
·正确
·错误
( )一个较窄的支承板支承工件精基准面可限制工件五个自由度。
·正确
·错误
( )为防止工件变形,夹紧力的作用点应远离切削部位。
·正确
·错误
( )偏心夹紧动作迅速、生产率高、夹紧力大、自锁性好。
·正确
·错误
( )机床支承件均设置纵向隔板来加强其抗扭刚度。
·正确
·错误
( )加工装备的动力参数是各种执行件的运动速度。
·正确
·错误
( )爬行是进给机构低速转动时工作台的均匀运动现象。
·正确
·错误
( )欠定位就是不完全定位,定位设计时要尽量避免。
·正确
·错误
( )对于轴类零件而言,定位元件只能用V型块。
·正确
·错误
下列制造装备属于辅助装备的是( )。
·夹具
·排屑机
·冲压机
·数控铣床
普通车床的主要性能指标(第二主参数)是 ( )。
· 床身上的最大回转直径
· 最大的工件长度
· 工作台工作面宽度
· 工作台工作面长度
已知一结构式为18 = 31×33×29 ,则基本组的传动副数为( )。
·1
·2
·3
·9
下列属于机床执行件的是( )。
·主电动机
·步进电机
·刀架
·双向离合器
用一面两孔定位时,削边销消除( )自由度。
·一个移动和一个转动
·一个转动
·两个转动
·两个移动
( )铸铁材料的抗振性能好,常作为机床支承件的首选材料。
·正确
·错误
( )主轴能传递全部功率的最低转速,称为主轴的计算转速。
·正确
·错误
( )设计大型机床的分级变速主传动系统时,应选用较小的公比φ。
·正确
·错误
( )夹紧力的作用点可以任意选取不受限制。
·正确
·错误
( )斜楔夹紧操作费时,自锁性差,但夹紧力大。
·正确
·错误
( )在车床上仅采用三爪卡盘夹紧圆柱时,圆柱的六个自由度被全部限制。
·正确
·错误
( )在各种类型的固定支承钉中球面销适合于精基准平面定位。
·正确
·错误
( )机床支承件采用横向隔板来加强其抗弯刚度。
·正确
·错误
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