试述选用石墨或紫铜作电极材料的优缺点?

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问题:

试述选用石墨或紫铜作电极材料的优缺点?

考点:模具制造工中级模具制造工中级模具制造工题库
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分式
x2-9
x-3
的值为0,则x=______.
题型:问答题 简答题

2012年6月,甲房地产开发企业(以下称甲企业)通过出让方式,在W市获得一宗居住用途的国有建设用地使用权,2013年3月开工建设。2014年1月,甲企业将该项目转让给乙房地产开发企业(以下称乙企业)。2014年9月该小区建成并交付使用,乙企业聘请丙物业服务企业(以下称丙企业)实施前期物业管理。2015年6月1日,该小区召开了首次业主大会,并选举产生了业主委员会。2015年7月1日,该小区选聘了丁物业服务企业(以下称丁企业),并签订了物业服务合同。

按照规定,该小区业主委员会产生后,应当向()部门备案。

A.物业所在地街道办事处

B.W市人民政府房地产行政主管部门

C.W市人民政府土地行政主管部门

D.W市人民政府

题型:问答题 简答题
阅读下面短文,从短文后各题所给的四个选项(A、B、C和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。
My ears are recently full of praising words from my friends such as, “ Oh, Beckham is so handsome, so cool that I can’t help falling in love with him!” or “What perfect skills he has!” Yeah,—I ______ to some degree, though I sometimes do want to______ them how much they know about Beckham, apart from his______ and how much they know about football apart from______ goals. It seems funny that we are______ about things, with which we are unfamiliar or about which we are______, but we all, my friends as well as I, consider this one of life’s______.
We need these pleasures to______ our lives. But that doesn’t______ to craziness or nonsense. As an old saying goes: “ Don’t judge a book by its cover.” We______ not judge anything from its appearance. We should all know, it is one’s good______ and great contribution that make one a star and unforgettable. Therefore we’d better say______ about Beckham’s good looks.
If we close our eyes, falling in deep______, we can find that the things that move us to be really happy or sad have a______ meaning. If we don’t go deeper and are just satisfied with______ things, sooner or later we will find that we have not really gained anything because our first______ has blinded and misled us, and we’ll remain ignorant______ we realize that and make some changes.
It is believed that thinking and going deeper than before is______ of great progress. If one day we are willing to go deeper into everything, no matter how much it______ us, we will finally prove how much we have______ up, how much more sensible, mature , and intelligent we have become.
小题1:
A.likeB.agreeC.hopeD.think
小题2:
A.askB.tellC.teachD.doubt
小题3:
A.skillsB.fameC.teachD.appearance
小题4:
A.kickingB.hittingC.scoringD.controlling
小题5:
A.thankfulB.crazyC.curiousD.anxious
小题6:
A.uncertainB.unhappyC.displeasedD.careful
小题7:
A.aimsB.qualitiesC.pleasuresD.truths
小题8:
A.keep upB.brighten upC.find outD.brighten about
小题9:
A.comeB.increaseC.amountD.rise
小题10:
A.daredB.wouldC.couldD.should
小题11:
A.thinkingB.characterC.looksD.ability
小题12:
A.moreB.somethingC.lessD.nothing
小题13:
A.loveB.sleepC.senseD.thought
小题14:
A.clearB.puzzlingC.movingD.valuable
小题15:
A.materialB.deepC.surfaceD.pleasant
小题16:
A.conclusionB.experienceC.lessonD.impression
小题17:
A.sinceB.althoughC.unlessD.before
小题18:
A.signB.causeC.valueD.willingness
小题19:
A.worriesB.painsC.satisfiesD.offers
小题20:
A.givenB.sentC.builtD.grown
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一般来说,收音部分出故障的机会较小,如果此部分出故障,一般是硬伤所致,如()。

A.引脚开焊

B.电路板有脱焊处

C.电路板有断裂处

D.高频头损坏

题型:问答题 简答题

检查对氯乙酰苯胺的药物

A.差示双波长紫外分光光度法
B.磺胺嘧啶片的含量测定
C.碘-碘化钾试液
D.甲醛-硫酸试液
E.甲醛硫酸试液

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