问题 单项选择题

焊机操作工采用管材对接焊缝试件和管板角接头试件考试时,母材管径D为219mm,经焊接操作技能考试合格后,适用于管材对接焊缝焊件外径和管板角接头焊件管外径()。

A、<219mm

B、100mm≤

C、<500mm

D、不限

答案

参考答案:D

单项选择题
完形填空
At the beginning of this century, medical scientists made an interesting discovery: we are built not just of flesh(肌肉) and blood but also of time. They were   41  to show that we all have a ‘body clock’   42  us, which controls the   43  and fall of our body energies,   44  us different from one day to the next.
The   45  of a ‘body clock’ should not be too   46  since the lives of most living things are controlled   47  the 24-hour night-and-day cycle(循环). We feel   48  and fall asleep at night and become   49  and energetic during the day. If the 24-hour cycle is   50  most people experience unpleasant   51 . For example, people who are not   52  to working at night can find that   53  of sleep causes them to   54  badly at work.
  55  the daily cycle of sleeping and   56 , we also have other cycles which   57  longer than one day. Most of us would   58  that we feel good on some days and not so good on   59 ; sometimes our ideas seem to flow and at other times, they   60  do not exist.
小题1:
A.anxiousB.carefulC.ableD.proud
小题2:
A.aroundB.insideC.betweenD.on
小题3:
A.riseB.supplyC.useD.movement
小题4:
A.showingB.treatingC.changingD.making
小题5:
A.ideaB.opinionC.storyD.invention
小题6:
A.difficultB.excitingC.interestingD.surprising
小题7:
A.fromB.overC.byD.during
小题8:
A.dull B.dreamy C.tired D.peaceful
小题9:
A.regularB.excitedC.clearD.lively
小题10:
A.shortenedB.disturbedC.resetD.troubled
小题11:
A.momentsB.sensesC.feelingsD.effects
小题12:
A.usedB.allowedC.expectedD.prevented
小题13:
A.missB.noneC.needD.lack
小题14:
A.showB.performC.manageD.control
小题15:
A.WithB.ExceptC.As well asD.Rather than
小题16:
A.waking B.movingC.livingD.working
小题17:
A.repeatB.remainC.happenD.last
小题18:
A.believeB.agreeC.realizeD.allow
小题19:
A.othersB.the otherC.all otherD.other
小题20:
A.onlyB.justC.stillD.yet