机床一般只允许正转工作,因为齿轮油泵反转不能打油,所以主轴不能高速(475r/min

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问题:

机床一般只允许正转工作,因为齿轮油泵反转不能打油,所以主轴不能高速(475r/min以上),且反转时间不应超过10min。()

考点:高低压电器装配工中级高低压电器装配工中级
题型:判断题

自然界中,不少鸟类取食植物的种子和果实后,随着鸟的飞行,一些没有消化的种子随粪便排出体外,而后萌发生长,这种繁殖方式是(  )

A.有性生殖

B.无性生殖

C.自然生殖

D.扦插

题型:判断题
A man and his wife arrived in Boston by train.After getting off the train, they walked without an  36  into the outer office of Harvard’s president.So they were stopped by his secretary and kept   37 .For hours, the secretary took no notice of them,  38  that the couple would finally become disappointed and   39 .But they didn’t.The secretary finally decided to disturb the president, though  40 
A few minutes later, the president walked towards the couple with a  41  face.The lady told him, “We had a son that  42  Harvard for one year.He loved Harvard.He was  43  here.But about a year ago, he was accidentally killed.My husband and I would like to  44  a memorial(纪念物)to him, somewhere on campus.”
The president wasn’t moved .Instead, he was   45 .“Madam,” he said, “we can’t put up a statue for every person who studied at Harvard and died.If we did, this place would look like a   46 ,” “Oh, no,” the lady  47  quickly.“We don’t want to put up a statue.We would like to give a  48  to Harvard.” The president rolled his eyes and  49  at the couple and then exclaimed(喊道), ” A building! Do you have any  50  how much a building costs? We have spent over $7,500,000 on the campus building at Harvard.” For a moment the lady was silent.The president was  51 , because he could get rid of them now.Then the lady turned to her husband and said quietly, “Is that all it costs to start a  52 ? Why don’t we just start our own?” Her husband nodded. 53  their offer was turned down,Mr. and Mrs. Stanford traveled to California where they founded Stanford University  54  after them , a memorial to a son that Harvard no longer  55  about.
小题1:
A.appointmentB.decisionC.acquaintanceD.choice
小题2:
A.talkingB.standing C.sitting D.waiting
小题3:
A.hopingB.findingC.realizingD.imagining
小题4:A.go down     B.go out       C.go around      D go away
小题5:A.hopelessly  B.carefully    C unwillingly     D.unexpectedly
小题6:
A.coldB.funnyC.pleasantD.sad
小题7:
A.attendedB.studied C.visitedD.served
小题8:
A.cleverB.braveC.proudD.happy
小题9:
A.set aboutB.set down C.set up D.set off
小题10:
A.satisfiedB.shockedC.excitedD.ashamed
小题11:
A.parkB.cemeteryC.gardenD.museum
小题12:
A.expressedB.explainedC.refusedD.admitted
小题13:
A.buildingB.yardC.playgroundD.square
小题14:
A.laughedB.shoutedC.glancedD.called
小题15:
A.suggestionB.thoughtC.ideaD.opinion
小题16:
A.boredB.astonishedC.interestedD.pleased
小题17:
A.departmentB.clubC.business D.university
小题18:
A.OnceB.WhileC.SinceD.Though
小题19:
A.followed B.looked C.takenD.named
小题20:
A.caredB.knewC.heardD.talked
题型:判断题

在虚拟存储器中,当程序正在执行时,由( )完成地址转换。

A.程序员
B.编译器
C.操作系统
D.以上都可以

题型:判断题

按建设用地的利用方式分类,土地可分为哪几类?

题型:判断题

《水利工程建设项目监理招标投标管理办法》阿规定,项目监理招标的()是该项目的项目法人。

A.招标人

B.投标人

C.代理人

D.监理人

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