转K3型转向架有何主要用途和结构特点?

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问题:

转K3型转向架有何主要用途和结构特点?

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黄铜是铜、锌合金,它用于制造机器、电器零件等。为测定某黄铜样品中铜的质量分数,取10g该黄铜样品,将40g19.6%的稀硫酸分四次加入,实验结果如下表:

19.6%r的硫酸/g10g10g10g10g
生成的氢气/g0.04g0.04gXg0. 02g
   

(1)X的值是        g

(2)该黄铜样品中铜的质量分数。

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第二卷(非选择题,共35分)

第四部分:写作(共两节,满分35分)

第一节 对话填空(共10小题;每小题1分,满分10分)

请认真阅读下面对话,并根据各题所给首字母的提示,在答题卡上标有题号的横线上,写出一个英语单词的完整、正确的形式,使对话通顺。

L =" Lucy  " J = Jim

L : Oh, I’ve just had a (76) t        day today.        76.     

J : What (77) h         ?                 77.     

L : Well, I overslept in the morning. I didn’t hear the       

(78) a        clock.                    78.     

J : Oh, everyone does that once in a (79) w         79.     

L : I was late for class, so I drove a little (80) f       . Guess who saw me?

80.     

J : A policeman? You got a ticket?

L : Yeah. He didn’t care that I was late. Anyway, I got to class,

(81) b        I had brought the wrong book. The teacher wasn’t     81.     

(82) h         .                  82.     

J : That’s really had.

L : What’s (83) w        , I have a paper due tomorrow. It’s on a        83.     

Hard drive (硬盘). I went to the computer lab and I couldn’t

(84) f          my file. I forgot to save the information.       84.     

J : Oh, not!

L : And now I need to go home. And you know (85) w       ?      85.     

My car keys are missing.

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甲向乙购买一批原材料用于生产,生产出的产品批发给丙,丙再批发给零售商丁,丁以零售价卖给消费者。依法律规定,在上述交易过程中需纳增值税的环节有( )。

A.甲乙之间的交易环节

B.甲丙之间的交易环节

C.丙丁之间的交易环节

D.丁向消费者销售的环节

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《公民道德建设实施纲要》分为几个部分?有多少条?多少字?

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哪些情况下,种子经营者不需办理种子经营许可证?

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