--- Tony, don't draw on the wall, it isn't good behavior.
--- _____.
A:Never mind
B:Yes, I'd love to
C:Of course not
D:Sorry, I won't
已知非空集合S={x|﹣12≤x≤m}满足:当k∈S时,有x2∈S,则实数m的取值范围是____
某农场第一车间有x人,第二车间比第一车间人数的 45 少30人,那么: