会导致钢产生冷脆性的化学元素是()。 A.硫 B.磷 C.氢 D.氧

题型:单项选择题

问题:

会导致钢产生冷脆性的化学元素是()。

A.硫

B.磷

C.氢

D.氧

考点:机械工程师机械制造基础机械制造基础题库
题型:单项选择题

下列腧穴中,哪穴不属于本经的母穴()

A.后溪

B.列缺

C.复溜

D.中冲

E.曲池

题型:单项选择题

关于DNA指导RNA合成的叙述中哪一项是错误的()

A.只有DNA存在时,RNA聚合酶才能催化生成磷酸二酯键

B.转录过程中RNA需要引物

C.大多数情况下只有一股DNA作为RNA合成的模板

D.RNA链的合成方向是5′→3′端

E.合成的RNA链没有环状的

题型:单项选择题
I could have easily gone through life without getting to know one of the most romantic feelings…love for a dog. For at least ten years my       had been suggesting that we get a dog.There were several reasons why the idea     . We had noticed that, on our block, couples with no children as a rule        one large or two small dogs. So we got one puppy       we too had no children.
He flew into the house with the        of a Formula 1(一级方程式赛车). In several minutes he ran over all the house,        from my shoulder onto the bed, and ended up in the       , where my wife washed him with motherly     . From that day on, the invisible(看不见的)       for the love of the new member of our household began at my home.
He seemed to        that at once. Most of the meals that my wife had        for him with greater care than those for me…he didn’t        look at.
Every evening I went out walking with him. I could not know who was walking whom      one evening, when, tired from work, I      the walk. The dog was very angry and dragged me out.
Last night our dog pulled me by the ear with his teeth,        me up in my dream, and dragged me into the kitchen to make me turn off the       which had disturbed(干扰) his sleep. I meekly(乖乖地)      that I had forgotten to switch off the light, but that was not       . He looked at me like a teacher at a pupil who repeatedly makes      .
Now we finally know who’s the        at home, and for twenty years we had seriously argued whether it was my wife or I.
小题1:A. wife              B  son         C.husband         D.daughterA
小题2:
A.came up withB.came outC.came up D.came onC
小题3:
A.keptB.rose C.carriedD.invitedA
小题4:
A.ifB.unless C.sinceD.beforeC
小题5:
A.speedB.shapeC.costD.raceA
小题6:
A.climbedB.jumpedC.coveredD.stopped
小题7:
A.yardB.streetC.bathroomD.kitchen
小题8:
A.worryB.careC.identityD.power
小题9:
A.signalB.workC.war D.truth
小题10:
A.doubtB.understandC.wonderD.dislike
小题11:
A.reachedB.searched C.lookedD.prepared
小题12:
A.evenB.stillC.everD.yet
小题13:
A.whileB.becauseC.untilD.as
小题14:
A.gave inB.gave upC.gave awayD.gave out
小题15:
A.brokeB.wokeC.pickedD.packed
小题16:
A.waterB.heaterC.cooker D.light
小题17:
A.hopedB.consideredC.admitted D.decided
小题18:
A.enoughB.goodC.bad D.true
小题19:
A.plansB.mistakes C.decisionsD.faces
小题20:
A.bossB.memberC.adultD.child
题型:单项选择题

对工字形截面钢筋混凝土构件承载力计算,下列说法正确的是( )。

A.受拉翼缘对构件受弯承载力没有影响,因此构件承载力计算时可以不考虑受拉翼缘
B.剪扭构件承载力计算时,首先满足腹板矩形截面完整性原则进行截面划分,再计算每个矩形对剪扭承载力的贡献
C.斜截面受剪承载力计算时,规范规定可以考虑翼缘对承载力的提高
D.弯扭构件承载力计算时,首先满足腹板矩形截面完整性原则进行截面划分,再计算每个矩形对抗扭承载力的贡献

题型:单项选择题

治疗寒性哮喘应首选

A.三拗汤
B.二陈汤
C.小青龙汤
D.定喘汤
E.荆防败毒散

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