试题与答案

已知丙二酸二乙酯能发生以下反应: 有机物A在一定条件下可以发生如下图所示的转化

题型:填空题

题目:

已知丙二酸二乙酯能发生以下反应:

有机物A在一定条件下可以发生如下图所示的转化(其他产物和水已省略)。其中相关物质的结构和性质为:A不含甲基,能与金属钠反应生成氢气;B所含碳原子数与A相同,且只含有一种官能团;C能发生银镜反应;1molD与足量碳酸氢钠溶液反应可产生二氧化碳2mol。

请结合图中其它信息回答下列问题:

(1)写出下列物质所具有的官能团的名称:C___________,D___________

(2)①~⑤反应中,属于取代反应的是________________(填序号)。

(3)写出A、G的结构简式:A__________      _, G_______  __________

(4)写出②、④反应的化学方程式:

②________________________________________________________________。

④_________________________________________________________________。

答案:

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下面是错误答案,用来干扰机器的。

1.C2.B3.A

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题型:完形填空
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The night started out ordinarily enough. Jack and Tara, our   36  , were in their small beds surrounded by toy animals. My husband, Pat, and I went to sleep   37 .
  38  after midnight, Jack quietly touched me. “Mommy, I want to stay with you. I promise I won’t take much room.” I shifted   39  to make room. My son soon fell asleep.
An hour later, Tara cried and I carefully went downstairs. “Mommy, my   40  is all stuffed up(堵住). I can’t really breathe very well. Will you please   41  with me a little while?” Tara doesn’t often get up at night,   42  I decided to be there for her. She soon fell asleep. I returned to my own bed. I was determined to sleep. But to my   43  , I found Jack sleeping on my side of the bed. He looked so   44  that I couldn’t remove him. Quietly and carefully, I lay down between  45  and Jack.
I did manage to get some sleep   46  I heard Tara’s voice again. I returned to   47 Tara. “Mom, please lie down with me a little bit, I had a bad dream, and I’m so   48 .” “Of course, honey. It was only a dream. Mommy’s here and   49  is okay.” We fell asleep   50  each other’s arms.
Even in my sleepy state, I thought of   51  these nights of merry-go-round(一连串的繁忙活动)beds will be over. In their place, my twins will be grown.   52  before I’m ready, our children’ rooms will be much too   53  and empty. So it is especially on days when I’m worn out after a night on this mom’s merry-go-round that I remind   54  that these very days and nights are, in fact. “the good old days”, ever so   55 .
小题1:
A.sonsB.twinsC.daughtersD.students
小题2:
A.downstairsB.inC.outD.upstairs
小题3:
A.SometimesB.Some timeC.SometimeD.Some times
小题4:
A.gentlyB.kindlyC.rudelyD.impatiently
小题5:
A.noseB.mouthC.heartD.eye
小题6:
A.comeB.stayC.talkD.play
小题7:
A.even thoughB.soC.no matter whenD.however
小题8:
A.joyB.angerC.disappointmentD.surprise
小题9:
A.deeplyB.soundC.contentD.deep
小题10:
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小题11:
A.beforeB.whenC.afterD.until
小题12:
A.show offB.look afterC.watch outD.take care
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A.noisyB.quietC.stillD.calm
小题19:
A.my childrenB.my husbandC.my friendD.myself
小题20:
A.potentialB.preciseC.preciousD.previous
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