均有杀虫止痒功效的药物是（）
A.土荆皮、蛇床子
B.硫黄、雄黄
C.白矾、炉甘石
D.大风子、蜂房
E.硼砂、砒石
参考答案：A
除数是4，则这道题的余数，可以是[ ]
A．0，1，2，3，4，5
B．0，1，2，3
C．0，1，2，3，4
D．0，1，2
— Could you tell me ?
— They are from Canada.[ ]
A. where are the twins from
B. where the twins are from
C. where were the twins from
D. where the twins were from
