清热凉血法的代表方剂为：（）.
A.膈下逐瘀汤
B.五味消毒饮
C.桃核承气汤
D.复元通气散
E.复元活血汤
参考答案：B
I think he has tried his best to improve his handwriting, ?
A．don’t I
B．do I
C．hasn’t he
D．has he
数控机床的主体结构有哪些特点？
