航空活塞发动机采用()热力学循环。 A.布莱顿循环 B.奥托循环 C.卡诺循环 D.

题型:单项选择题

问题:

航空活塞发动机采用()热力学循环。

A.布莱顿循环

B.奥托循环

C.卡诺循环

D.膨胀循环

考点:发动机构造发动机构造题库
题型:单项选择题
完形填空。阅读下面短文,从短文后各题所给的四个选项(A、B、C、D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
One of my father’s favorite sayings as I was growing up was “Try it!” I couldn’t say I didn’t like 21, whatever it might be, 22 I tried it. Over the years I’ve come to 23 how much of my success I owe to my 24 of those words as one of my values. My 25 job was just one I decided to try for a couple of years until I 26 what I wanted to do as a career (职业) .  27 I believed I would work for a few years, get married, stay home and raise a family, so I didn’t think the job I took 28 that much . I couldn’t have been more 29. I mastered the skills of that beginning level position and I was given the opportunity (机会) to 30 through the company into different 31. I adopted each new opportunity with the 32, “Well, I’ll try it; if I don’t like it I can always go back to my 33 position.” But I was with the same company for the past 28 years , and I’ve 34 every career change I’ve made. I’ve discovered I 35 a large number of different talents (才能) and skills that I never would have thought were within me had it not been for my being 36 trying new opportunities. I’ve also discovered that if I 37 what I’m doing and word hard at achieving my 38. I will succeed. That’s why I am so 39 to be a part of CareerFables.com. I think 40 has come and I am determined to make it a success.
小题1:
A.everythingB.somethingC.everybodyD.somebody
小题2:
A.until afterB.ever sinceC.so thatD.long before
小题3:
A.considerB.argueC.includeD.realize
小题4:
A.suggestionB.explanationC.acceptanceD.discussion
小题5:
A.hardB.bestC.extraD.first
小题6:
A.determinedB.examinedC.experiencedD.introduced
小题7:
A.ActuallyB.GraduallyC.FinallyD.Usually
小题8:
A.helpedB.requiredC.expressedD.mattered
小题9:
A.carefulB.mistakenC.interestedD.prepared
小题10:
A.look upB.take upC.move upD.put up
小题11:
A.situationsB.choicesC. directionsD.positions
小题12:
A.thoughtB. replyC.actionD. advice
小题13:
A.easierB. newerC. earlierD. higher
小题14:
A.permittedB.countedC.organizedD.enjoyed
小题15:
A.showB.possessC.needD.gather
小题16:
A.lucky forB.slow atC.open toD.afraid of
小题17:
A.think ofB.give awayC.believe inD.turn into
小题18:
A.businessB.goalC.fortuneD.growth
小题19:
A.excitedB.curiousC.surprisedD.helpful
小题20:
A.dreamB.timeC.powerD.honor
题型:单项选择题

在农药、食品、化妆品毒理学安全评价程序中,属第四阶段的试验是()

A.急性毒性试验

B.致突变试验

C.亚慢性毒性试验

D.慢性毒性试验

E.人体激发斑贴试验

题型:单项选择题

对痛风性关节炎描述错误的是()

A.反复发作的关节痛

B.以足跖趾关节多见

C.常伴皮肤红肿灼痛

D.常因饮酒而诱发

E.一般不遗留畸形

题型:单项选择题

适当上下倾斜第二代居民身份证,便会观察到证件背面的左上方有一个变色的长城图案,呈()色。

A.浅蓝

B.浅紫

C.橙绿

D.橙黄

题型:单项选择题

农业小气候

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