题目内容

气压日振幅随纬度的增高而减小。

A. 对
B. 错

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简述流体的主要力学性质

污水排放标准可分为地方排放标准和一般排放标准两类。

A. 对
B. 错

Directions: You find your study load is too heavy. Write a letter to your college teacher to1) tell him/ her the need to drop two courses,2) explain the reasons, and3) ask if it is possible to obtain a refund

Directions: Write a notice in the name of the Student Union, announcing the founding of a club.