He is _____ brother. _____ name is Bob. [ ]
A. my; He
B. he; My
C. my; His
D. I; He
答案:C
氟利昂制冷剂有何优缺点?
有剧毒,从皮肤吸收,外用亦不能大面积涂搽及长期持续使用的药物是()
A.雄黄
B.炉甘石
C.明矾
D.马钱子
E.蛇床子