按公称压力划分,工作压力大于100MPa的阀门属于()。A、低压阀门 B、中压阀门

题型:单项选择题

问题:

按公称压力划分,工作压力大于100MPa的阀门属于()。

A、低压阀门

B、中压阀门

C、高压阀门

D、超高压阀门

考点:工程与技术科学空分技术空分技术题库
题型:单项选择题

山西省煤炭资源丰富,是我国重要的能源基地,但在煤炭生产过程中,存在着安全事故隐患。读“山西省某地地质构造剖面图”。完成问题。

小题1:下列地点能够露天开采煤炭且比较安全的是(  )

A.甲

B.乙

C.丙

D.丁小题2:在a、b两处采煤,最容易发生的矿难事故分别是(  )

A.瓦斯爆炸和透水事故

B.井喷事故和瓦斯爆炸

C.透水事故和瓦斯爆炸

D.透水事故和井喷事故

题型:单项选择题
With the introduction of family planning policies in the 1970s, most Chinese teenagers have no brothers or sisters.They get to be the beloved(心爱的)__36__child.But they may not realize that they will have to “__37__”the love as their__38__ones grow old.They will have to__39__lots of old people—their parents, grandparents, their__40_parents and grandparents.China is being__41__country.
According to the United Nations, an aging society refers to one   42  10 percent or more of the population is over 60, or 7 percent or more is over 65. According to   43  from the Ministry of Civil Affairs, by 2008, Chinese over 60 years old made up 12 percent of the nation’s total population. The   44  for those aged 65 or older was 8.3 percent.
In China, people have a belief that “parents raise children; then the children care for the parents as they get old”.But this__45__is under stress as the market ey puts millions of young Chinese on the road__46__better paying jobs.They are leaving their parents__47 .Now many families are looking more to the government than to their__48__for support when they’re old.China has increased its basic social security(基本社会保险)plan which is__49__protecting those__50__, including the old, the disabled and others.These programs are now broad, __51__they are still not highly developed.
As more people grow__52__, China will have fewer working people, __53__will slow down economic growth. According to a November 26 report in the Economic Information Daily, an expert said China should  54 its people to have more than one child in the future  55 China should keep its labor population and total population size stable(稳定的).
小题1:
A.onlyB.lonelyC.friendlyD.heartily
小题2:
A.take upB.take backC.pay backD.pay for
小题3:
A.hatedB.lovedC.tiredD.hearted
小题4:
A.care forB.bring upC.look forD.pay attention to
小题5:
A.daughter’s or son’sB.niece’s or nephew’s
C.wife’s or husband’sD.aunt’s or uncle’s
小题6:
A.an oldB.an agingC.a developingD.a developed
小题7:
A.whereB.whenC.whichD.that
小题8:
A.an articleB.an emailC.a magazineD.a report
小题9:
A.conclusionB.characterC.figureD.survey
小题10:
A.traditionB.opinionC.sayingD.way
小题11:
A.in favor ofB.in search ofC.in the way ofD.in the face of
小题12:
A.outB.offC.aheadD.behind
小题13:
A.friendsB.relativesC.parentsD.children
小题14:
A.an actB.a caseC.a programD.a plan
小题15:
A.in dangerB.in needC.in desperateD.in disaster
小题16:
A.butB.orC.andD.so
小题17:
A.strongB.realisticC.richD.old
小题18:
A.asB.whichC.whatD.that
小题19:
A.forbidB.promiseC.encourageD.order
小题20:
A.so thatB.thoughC.even ifD.because
题型:单项选择题

煤气管道压力损失的叙述不正确的是()。

A.流速越高,压力损失就越大;

B.管径越大,压力损失越大;

C.管道越长,压力损失就越大;

D.阀门变径越多,压力损失就越大。

题型:单项选择题

患者右肾结石,直径1.8cm,右肾盂输尿管交界处狭窄,适当的治疗方法是

A.药物保守治疗

B.输尿管肾镜取石

C.输尿管套石术

D.ESWL

E.肾盂切开取石+肾盂成形术

题型:单项选择题

治疗经早宜取

A.气海、三阴交、地机、次髂
B.气海、三阴交、血海、归来
C.气海、三阴交、肾俞、脾俞、交信、足三里
D.气海、三阴交、太冲、太溪
E.气海、三阴交、交信、隐白

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