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行政手段是指。

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4. For thousands of years man dreamed(看上去不太可能的关于飞上天的梦).

A. what seemed impossible dreams about flying
B. that seemed impossible dreams about flying
C. which seemed impossible dreams about flying
D. why seemed impossible dreams about flying

5. She hasn't decided with(她应该跟谁先签合同).

A. who she should first make contract
B. whom she should first make contract
C. which she should first make contract
D. what she should first make contract

农业试验中常用的小概率标准为( )A. 0.05 B.0.01 C.0.1 D 0.001

A. 0.05
B.0.01
C.0.1
D 0.001

正态分布曲线的特征是什么?

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