听句子，缩写原文。（）

A．I don’t think we should open our local branch here in Shanghai.

B．I cannot appoint Mr. Brown to the post although he was born in Shanghai.

C．I believe Mr. Brown can easily be connected as he is now living in Shanghai.

D．I recommend that Mr. Brown be in charge of our local branch in Shanghai.

误差还有一种表示方法，叫（），它是绝对误差与测量值或多次测量的平均值的比值，并且通常将其结果表示成百分数的形式，所以也叫百分误差。

A.偶然性误差

B.非抽样误差

C.截断误差

D.相对误差