试题与答案

说出测定钢材应变时效的原理。

题型:问答题 简答题

题目:

说出测定钢材应变时效的原理。

答案:

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下面是错误答案,用来干扰机器的。

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题型:单项选择题

由气溶胶的辐射特性引起的冷却作用类似于遮阳伞,故称为“阳伞效应”。悬浮在大气中的气溶胶颗粒一方面将部分太阳入射辐射反射回宇宙空间,削弱了到达地面的太阳辐射能,增加行星反照率,使地面接收的太阳能减少;另一方面某些吸湿性的粒子又作为凝结核,促使周围水汽在它上面凝结,导致低云、雾的增多,改变云的光学特征和寿命,使云的反照率增加,同样具有减少入射辐射,使地面和底层大气的温度降低的作用。“阳伞效应”在北半球表现得最为明显,其原因在于本地区较高的工业化程度和由此产生的空气污染。
对这段文字理解不准确的是( )。

A.气溶胶因其辐射特性能产生的“阳伞效应”
B.大气中的气溶胶具有很强的吸湿性
C.气溶胶能极大地防止太阳对地球的辐射
D.空气污染物能增强“阳伞效应”

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题型:完形填空
阅读下面短文,掌握其大意,然后从下列各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。
I was in a department store with my mom, aunt, and my sister a few days ago.   61 , I am one of those people who do not like to go shopping with my family. However, I decided this time to   62  them.
My aunt and I were   63 for some things to buy for our family when I noticed two   64 on the side. One of them had a little girl sitting on it with her  65 nearby and the other one was  66 . So, I decided to sit down. While I was   67 my own thing there, I  68 that the family were not in front of the   69 anymore. I saw the girl  70 and look around for her family. She came back and I saw her in  71 , crying.
I knew that she  72 her family and was all by herself . Now, I am sure that almost everybody has been lost in a department store or   73 big before and we all know that feeling.   74 I went up to her and asked what was   75 and in between tears she told me she was lost. I   76 her a smile card I just bought. You should have seen the  77  on her face when she read it. Then I went up to customer service center and  78 them what happened. People there promised to  79 her. After I left, the little girl’s parents went there and I could see them looking around for the person who had found their daughter and given her the   80 . Little did they know it was a regular teenager who did it.
小题1:
A.LuckilyB.UsuallyC.SadlyD.Surprisingly
小题2:
A.helpB.encourageC.joinD.support
小题3:
A.answeringB.lookingC.preparingD.calling
小题4:
A.chairsB.childrenC.signsD.toys
小题5:
A.friendsB.bookC.familyD.bags
小题6:
A.cleanB.largeC.emptyD.beautiful
小题7:
A.studyingB.carryingC.buyingD.doing
小题8:
A.noticedB.believedC.doubtedD.understood
小题9:
A.shopB.giftC.girlD.lady
小题10:
A.get upB.come upC.give upD.make up
小题11:
A.returnB.detailC.vainD.tears
小题12:
A.hatedB.raisedC.lostD.lived
小题13:
A.somewhereB.somethingC.everywhereD.everything
小题14:
A.IfB.AsC.SoD.Or
小题15:
A.importantB.wrongC.strangeD.different
小题16:
A.lentB.gaveC.sentD.posted
小题17:
A.smileB.hopeC.puzzleD.worry
小题18:
A.remindedB.warnedC.askedD.told
小题19:
A.look out forB.take care ofC.wait forD.call up
小题20:
A.courageB.moneyC.explanationD.card
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