不宜与牵牛子同用的药物是（）
A.甘草
B.巴豆
C.乌头
D.三棱
E.藜芦
参考答案：B
-I had a really good weekend at my uncle's.
-________.[ ]
A．Oh, that's very nice of you
B．Congratulations
C．It's a pleasure
D．Oh, I'm glad to hear that
表示某地1990～1994年肝炎病例的年龄分布，宜采用( )
A．直方图B．直条图C．线周D．圆形图E．散点图
