—It's very cold here in winter this year

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问题选择题

—It's very cold here in winter this year.
—______.

A. So is it
B. So it does
C. So does it
D. So it is

答案

答案：D

选择题

— Are there any children under the tree?

— ____________________________.[ ]

A. Yes, they are

B. Yes, they do

C. Yes, there are

单项选择题

中误差可以作为比较观测值之间精度高低的一种指标下述哪项是错误的（）。

A.精度愈高，中误差愈大

B.精度愈高，中误差愈小

C.中误差是表征精度的一个绝对的数字指标

D.以上都不对