Many people believe we are heading for e

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问题选择题

Many people believe we are heading for environment disaster ____ we basically change the way we live.

A. if
B. but
C. unless
D. once

答案

答案：C

单项选择题

空气压缩机属于气压传动的（）

A、控制元件

B、辅助元件

C、执行元件

D、气源装置

单项选择题

有以下程序：void sort(inta[],intn) { inti,j,t; for(i=0;iA．1,2,3,4,5,6,7,8,9,10,

B．1,2,7,6,3,4,5,8,9,10,

C．1,2,7,6,5,4,3,8,9,10,

D．1,2,9,8,7,6,5,4,3,10,