在水溶液中无起昙现象的是（）
A.司盘80
B.吐温80
C.肥皂类
D.氯苄烷铵
E.西土马哥
参考答案：A
--- Have you got any particular plans for the coming holiday?
--- Yes. ________, I’m going to visit some homes for the old in the city.
A．If possible
B．If ever
C．If busy
D．If anything
日本的4个大岛中，面积最大的是北海道岛．______．
