湖南省的简称是_____。(五级、四级)
参考答案：湘
— Do you know who ______ the telephone?
— Sorry, I don't know. [ ]
A. discovered
B. invented
C. talked
D. thought of
既能润肠通便，又能利水消肿的药物是
A．甘遂
B．牵牛子
C．火麻仁
D．郁李仁
E．芒硝
