读下图，站在山顶一定不能看到山脚的点
A、a
B、b
C、c
D、d
答案：C
Did you enjoy _____ in the park yesterday? [ ]
A. you
B. your
C. yourself
儿童急性血吸虫病吡喹酮治疗总剂量为
A．40mg/kgB．60mg/kgC．120mg/kgD．140mg/kgE．200mg/kg
