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【简答题】
蒸馏是根据液体化合物中各组分具有不同的( ) 的性质而进行分离的。每一种液体在一定的温度下,其( )是一定的,与液体的量( ),也与外界大气压力( )。随着温度的升高,蒸气压也在不断的( )。当其蒸气压与外界大气( )大气压相等时,液体开始大量汽化,此时有大量气泡从液体内部逸出,即液体在该大气压下沸腾了,这时的温度即该液体在此压力的( )。一个纯净的液体在一定的外界大气压下其沸点是一个 ( ) 。
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举一反三
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A.
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B.
when the train will arrive
C.
when the train will arrive at
D.
when will the train arrive at
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while
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as soon as
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until
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A.
If ever
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A.
What’s more
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D.
When necessary
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A.
If so
B.
If not
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If necessary
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【简答题】缓冲溶液是由 ____________ 和 _________ 的共轭酸碱对组成,组成缓冲溶液的共轭酸碱对称为 ___________ 。
【单选题】— I hear Johnson was badly injured in the accident. — ____, let’s go and see him.
A.
What’s more
B.
If so
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Where possible
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