人类共同利益原则

We were aware that, _____, the situation will get worse.

A．if not dealing with carefully

B．if dealt not carefully with

C．if not carefully dealt with

D．if not carefully dealing with

设线性方程组

与方程
x₁+2x₂+x₃=a-1 ②
有公共解，求a的值及所有公共解．

参仁丸功效与作用

与打印输出效果完全一致的显示视图称为（）视图。

A.普通

B.大纲

C.页面

D.主控文档

单位位错