不等式3（1+12x）≥-0.5x-7的解集是x≥-5，
所以最大负整数的解是-1．
— Have you ever been to Shanghai?
— Yes. I there with my father last year.
A．went
B．have been
C．have gone
D．has been
动物药麝香的主要活性成分是（）
A.麝香甙
B.麝香碱
C.麝香醇
D.麝香酮
