能行气止痛，长于行肠胃气滞的药物是（）
A.柴胡
B.沉香
C.木香
D.藿香
E.檀香
参考答案：C
______ him well, I would have invited him to my birthday party.
A．Had I known
B．Should I know
C．If I know
D．If I knew
计算机的型号为486，则486是指( )。
A．cpu速度
B．硬盘容量
C．cpu类型
D．内存大小
