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【简答题】
地质大循环与生物小循环的关系?
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举一反三
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【简答题】《经传释词》是一部收录虚词的词典,由清人 ( ) 编著
【简答题】A greenhouse is a building made of glass which is used for keeping plants when the outside temperature is low. In a similar way there are several gases in the atmosphere which trap(捕捉)the heat produce...
【单选题】About the t distribution centered on 0,Which is wrong?
A.
The distribution is a cluster of curves.
B.
The distribution is symmetric .
C.
when v(degree of freedom) is identical ， | t | is much bigger ， P value is also bigger.
D.
The distribution is unimodal.
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