在电火花加工中,为使脉冲放电能连续进行,必须靠()的进给和()来保证放电间隙。

题型:填空题

问题:

在电火花加工中,为使脉冲放电能连续进行,必须靠()的进给和()来保证放电间隙。

考点:机械工程模具制造工艺学模具制造工艺学题库
题型:填空题
选择不属于同一类的单词。
( ) 1. A. elbow
( ) 2. A. warm 
( ) 3. A. short
( ) 4. A. under  
( ) 5. A. pink 
B. shoulder
B. mouth   
B. leg    
B. on          
B. big     
C. stomach
C. hot   
C. finger
C. cold        
C. purple
D. happy
D. cool  
D. head                                             
D. out                                                                  
D. red  
题型:填空题
用0、0、0、4、4、4组成的六位数中一个“零”也不读的是(  )
A.440004B.400044C.444000
题型:填空题

默写出下列空缺处的文字。(任做三题,每题2分,共6分)

小题1:还顾望旧乡,                 ,忧伤以终老。(《古诗十九首·涉江采芙蓉》)

小题2:山不厌高,海不厌深。                  。(曹操《短歌行》)

小题3:户庭无尘杂,虚室有余闲。                   。(陶渊明《归园田居》)

小题4:又前而为歌曰:“                           !”(《战国策·荆轲刺秦王》)

题型:填空题
Valentine’s Day may come from the ancient Roman feast of Lupercalia.   36  the fierce wolves roamed nearby, the old Romans called   37  the god Lupercus to help them. A festival in his   38  was held on February 15th. On the eve of the festival the   39  of the girls were written on   40  of paper and placed in jars. Each young man   41  a slip. The girl whose name was   42  was to be his sweetheart for the year.
Legend   43  it that the holiday became Valentine’s Day   44  a Roman bishop named Valentine. Emperor Claudius II   45  the Roman soldiers NOT to marry or become engaged. Claudius felt married soldiers would   46  stay home than fight. When Valentine   47  the Emperor and secretly married the young couples, he was put to death on February 14th, the   48  of Lupercalia. After his death, Valentine became a   49 . Christian bishop moved the holiday from the 15th to the 14th—Valentine’s Day. Now the holiday honors Valentine   50  of Lupercus.
Valentine’s Day has become a major   51  of love and romance in the modern world. The ancient god Cupid and his   52  into a lover’s heart may still be used to   53  falling in love or being in love. But we also use cards and gifts, such as flowers or jewelry, to do this.   54  to give flower to a wife or sweetheart on Valentine’s Day can sometimes be as   55  as forgetting a birthday or a wedding anniversary.
小题1:
A.WhileB.WhenC.ThoughD.Unless
小题2:
A.uponB.backC.offD.away
小题3:
A.honorB.beliefC.handD.way
小题4:
A.problems B.secretsC.names D.intentions
小题5:
A.rolls B.pilesC.works D.slips
小题6:
A.castB.caught C.drewD.found
小题7:
A.givenB.chosenC.electedD.delivered
小题8:
A.tellsB.meansC.makesD.has
小题9:
A.afterB.sinceC.asD.from
小题10:
A.orderedB.appealedC.imaginedD.believed
小题11:
A.otherB.simplyC.ratherD.all
小题12:
A.dislikedB.resistedC.defeatedD.dishonored
小题13:
A.celebrationB.arrangementC.feastD.eve
小题14:
A.goat B.saintC.modelD.weapon
小题15:
A.becauseB.madeC.insteadD.learnt
小题16:
A.partB.representative C.judgmentD.symbol
小题17:
A.storyB.wanderC.arrowD.play
小题18:
A.describeB.requireC.demandD.alarm
小题19:
A.KeepingB.DisapprovingC.SupportingD.Forgetting
小题20:
A.constructive B.damaging C.strengtheningD.responding
题型:填空题

下面关于构造函数和析构函数的描述中,错误的是( )。

A.析构函数可以声明为虚函数

B.对虚析构函数的调用可以采用动联编

C.一个类的虚函数仅对派生类中重定义的函数起作用,对其他函数没有影响

D.构造函数可以声明为虚函数

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