Mary’s ruler is much longer than _______ . [ ]
A. our
B. their
C. mine
D. her
答案:C
哪种药物对抗肝素过量的自发性出血最有效()。
A.维生素K
B.维生素C
C.垂体后叶素
D.鱼精蛋白
E.右旋糖酐
12Sh-28型离心泵的吸水管口径为多少?