直线x+(2+m)y+1=0与(m+2)x-my-2=0平行，则m=（）。_爱下问搜题

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问题填空题

直线x+(2+m)y+1=0与(m+2)x-my-2=0平行，则m=（）。

答案

-1

选择题

Sandy: How was your vacation in America?

Linda: It couldn't be worse! I don't _____ want to talk about it! [ ]

A. even

B. least

C. never

D. then

单项选择题

气焊2～3mm厚的钢板，应选用直径为（）mm的焊丝。

A．1～2

B．2

C．3～4

D．4～6