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【单选题】
下列不属于离散分布的是( )。A.
二项分布
B.
泊松分布
C.
正态分布
D.
超几何分布
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举一反三
【单选题】This is so difficult a question _____.
A.
that many students can't answer
B.
which many students can’t answer it
C.
as no one can answer it
D.
as nobody can answer
【简答题】This article is so difficult that it is _________ our understanding.
【简答题】This is so difficult a question _____.A. that many students can't answer
【单选题】This is so difficult a problem that the scientist is known to ______ on it for about ten years, but hasn't found an answer yet.
A.
have worked
B.
have been working
C.
be working
D.
work on
【简答题】绝对高程是 ,相对高程是 高差是 。
【简答题】什么是绝对高程 ? 什么是相对高程 ? 绝对高程又被称为什么?
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