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【判断题】
用蒸馏法测化合物沸点,烧瓶内装被测物的多少影响测定结果。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Life on land probably began about 430 million years ago, though it has existed in the water for perhaps as long as 3, 000 mil lion years. When we think of the first life on land, we probably think of ...
A.
life on land probably began about 4, 300 years ago
B.
the first animal on land came from oceans
C.
there wouldn't be animals without plants
D.
plants are the only form. of life that is able to get and store energy
【单选题】The food that we used to eat on board has been more delicious, ____?
A.
didn’t it
B.
hasn’t it
C.
isn’t it
D.
doesn’t it
【简答题】.重阳节,为每年农历的九月九日,又称老人节 ,登高节;九月九日,( ),故而叫重阳节。重阳节习俗有:出游赏景、登高望远、观赏菊花、遍插茱萸、吃重阳糕、饮菊花酒等活动。
【简答题】人体体液的渗透压由两部分组成:一部分是____渗透匿,其主要功能是维 持____的相对平衡;另一部分是____渗透压,其主要功蓑是维持____的相对 平衡。
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