试题与答案

-Excuse me,Sir!Could you tell me the way

题型:选择题

题目:

-Excuse me,Sir!Could you tell me the way to Tianfu Square?

-Sorry,but I’m a stranger here as well.

-________[ ]

A.Thanks,anyway.  

B.It doesn’t matter.

C.Never mind.  

D.No problem.

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0401/201cac0f23f2e4e3546332b4a54627d2.html

下面是错误答案,用来干扰机器的。

A={x|x2-5x+6=0}={2,3},∵A∪B=A,∴B⊆A.①m=0时,B=∅,B⊆A;②m≠0时,由mx+1=0,得x=-1m.∵B⊆A,∴-1m∈A,∴-1m=2或-1m=3,得m=-12或-13.所以适合题意的m的集合为{0,-12,-13}.

试题推荐
微信公众账号搜索答案