Tom often plays basketball_____ his frie_爱下问搜题

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问题选择题

Tom often plays basketball _____ his friends.[ ]

A. to

B. on

C. with

D. at

答案

答案：C

单项选择题

The central limit theorem concerns the sampling distribution of the:（）

A. population mean.

B. sample mean.

C. population standard deviation.

问答题简答题

以柱塞式喷油泵为例简述柴油机燃料喷射过程。