活血行气止痛作用强，研末服即有效的药物是（）
A.三七
B.延胡索
C.郁金
D.虎杖
E.自然铜
参考答案：B
I’m amazed to hear from my old friend again. _____, it is ten years since we met last.
A．in other words
B．all in all
C．That’s to say
D．Believe it or not
肝细胞癌发病与____________和__________密切相关。病理学上分为________、_________和_________三型。
