药物类型
抗组胺药
A．异丙嗪B．氯丙嗪C．双嘧达莫D．泛硫乙胺E．乙酰胺
参考答案：A
On hearing the horrible noise,they all went out and looked at what was happening in________.[ ]
A. amusement
B. enjoyment
C. amazement
D. embarrassment
一个n边形的内角和等于720°，那么这个多边形的边数n=______．
