驱除鹅的剑带绦虫以选用（）为好。
A、左旋咪唑
B、敌百虫
C、吡喹酮
D、灭绦灵
参考答案：C
— Excuse me, can I turn right here?
— No, you can't. Please look at the sign _____. [ ]
A. B. C.
简述表象理论。
B. 
C. 