下列说法中正确的是（ ） A．一个2N的力可分解为7N和4N的两个分力 B．一个

One of my classmates _____ to see me tonight and we'll talk about our school lives. [ ]

A. is coming

B. came

C. are coming

D. has been coming

一般将PH值≤5.6的降雨称为酸雨。

矿物的显微硬度

诉讼期间

宴客时子女可在桌上一起共餐，尤其以媳妇、女儿更为优先。