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【简答题】
化学就在我们身边，与我们的生活息息相关。请回答以下生活中的问题： （1）家用天然气（或液化气）中常添加一种具有特殊气味的物质乙硫醇。天然气主要成分的化学式是 。当闻到该气味时，提醒人注意天然气（或液化气）已经在泄露。能闻到乙硫醇的气味，这证实了分子________________的性质。 （2）通常所说的煤气中毒是指由 引起的中毒。 （3）长期使用的暖水瓶内胆常有一层水垢（主要成分为CaCO 3 、Mg(OH) 2 ），可以用厨房中的调料 除去它。
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皮皮学刷刷变学霸
举一反三
【简答题】By no means _____ to your parents. A．is this the first time you are lying B．this is the first time you have lied C．this is the first time you tell a lie D．is this the first time you have lied
【单选题】Is this all that you need? If you married me, I’d give you everything you _____.
A.
want
B.
wanted
C.
had wanted
D.
are wanting
【单选题】老子说：“天下皆知美之为美，斯恶矣；皆知善之为善，斯不善。”这个命题看到了 ( )
A.
美与恶的直接同一
B.
善与不善的绝对对立
C.
主要矛盾决定事物的性质
D.
事物的相反相成，物极必反
【单选题】Hello. __ Dale speaking. __Mr. Green? [ ]
A.
that is, Is this
B.
this is, Is that
C.
I am, Are you
D.
I'm, Is that
【单选题】—Is this you ruler? —_____. [ ]
A.
Yes, this is
B.
Yes, it's
C.
No, it isn't
D.
No, it is
【单选题】Do you know ________
A.
what is this used for
B.
what this is used for
C.
which this is used
D.
that this is used for
【单选题】下列说法中，符合量变与质变辩证关系的是（）。
A.
天下皆知美之为美，斯恶矣；皆知善之为善，斯不善矣
B.
泰山不让土壤，故能成其大；河海不择细流，故能就其深
C.
走不以手，缚手不能疾；飞不以尾，屈尾不能远
D.
不登高山，不知山之高也；不临深谷，不知地之厚也
【单选题】Do you know ________ A. what is this used for B. what this is used for C. which this is used D. that this is used for
A.
what is this used for
B.
what this is used for
C.
which this is used
D.
that this is used for
【简答题】You should say: Describe a good law in your country. What the law is How you first learned about this law Who benefits from this law (who is affected by this law ) And explain why you think this is a ...
【简答题】翻译:天下皆知美之为美,斯恶已;皆知善之为善,斯不善矣。
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