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【单选题】
把自行车改装一下就成了电动车,是运用了哪种设问法A.
有无其他用途
B.
能否改变
C.
能否调整
D.
能否扩大
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A.
它比其他抽样方法效果差
B.
它要求有一个包含全部单位的抽样框
C.
计算公式复杂
D.
样本单位较为分散，调查不易实施
E.
无法对总体做出推断
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A.
would
B.
should
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【单选题】“从含有N个个体的总体中抽取n个个体，使包含有n个个体的所有可能的组合被抽取的可能都相等”的抽样方法称为（）。
A.
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B.
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C.
系统随机抽样
D.
分段随机抽样
E.
整群随机抽样
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