题目

不等式|x-1|≥x的解集为A.［,+∞)           B.(-∞,］        C.(-∞,1］   D.(∞,) 答案：B解析:特值验证：x=0成立，A不正确；x=1不成立，C项不正确;x=成立,∴选B. What __________ your first teacher like ,friendly or serious ?      A does        B did        C was       D is