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【多选题】
关于整群抽样与分层抽样，下述说法正确的是（）。A.
整群抽样适用于群间差异性较小的情形
B.
整群抽样适用于群内异质性较大的情形
C.
分层抽样适用于群间异质性较大的情形
D.
分层抽样适用于群间异质性较小的情形
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【单选题】—____ yogurt do we need to make fruit salad? —A cup. [ ]
A.
How much
B.
How many
C.
How long
D.
How often
【单选题】—_____ bread do we need, Mom? —Two kilos, I think. A. How many B. How often C. How long D. How much
A.
B.
C.
D.
D
【单选题】( )3.— _____ bread do we need, Mom? — Two kilos, I think. A. How many B. How often C. How long D. How much
A.
How many
B.
How often
C.
How long
D.
How much
【单选题】—______milk do we need? —Just one cup. [ ]
A.
How much
B.
How long
C.
How often
D.
How many
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