肝素的主要作用有
A.加快灭活凝血酶的速度
B.增强抗凝血酶与凝血酶的亲和力
C.刺激血管内皮细胞大量释放抗凝血物质
D.可防止血栓形成
- · 有4位网友选择 D,占比44.44%
- · 有3位网友选择 C,占比33.33%
- · 有2位网友选择 B,占比22.22%
A.加快灭活凝血酶的速度
B.增强抗凝血酶与凝血酶的亲和力
C.刺激血管内皮细胞大量释放抗凝血物质
D.可防止血栓形成
A.be left
B.left
C.are leaving
D.being left
Speaker B: ______
A.What's the matter with you?
B.Why should I?
C.You don't have to ask.
D.Sure, here you are.
A.one can
B.one cannot
C.can one
D.cannot one
A.the parks themselves
B.big organizations
C.professional musicians
D.musicians.
A.the attendants don't have to pay.
B.the seating is on a first come basis
C.they provide free picnic supper
D.they are held in open air
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