问题
单项选择题
麦示均数抽样误差大小的指标是（）。
A．σ
B．
C．n
D．
E．CV
答案
参考答案：D
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麦示均数抽样误差大小的指标是（）。
A．σ
B．
C．n
D．
E．CV
参考答案：D
| 选择方框中的句子完成对话，其中有两项多余。 Mike: Hi, Jim. 1 Jim: I am going to the gym. Mike: 2 Jim: I'm going to take part in the football match there. 3 Mike: Of course. I'll go there to cheer you on. Jim: Oh. It's very good. 4 Mike: Yes, I do. But I don't play very well. Jim: You need more practice. Mike: Yes, you're right. 5 Jim: At five o'clock. Mike: Oh, it's ten past four now. Let's hurry. | |
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