肝素抗凝作用的主要机制是()
A.直接灭活凝血因子
B.激活血浆中的ATⅢ
C.抑制肝脏合成凝血因子
D.激活纤溶酶原
E.与血中Ca2+结合
参考答案:B
组句。
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2. it , time , is , go , bed , to , to (.)
3. girls , how , are , there , many , your , in , class (?)
4. dinner, have, what, do, they, for (?)
5. maths, we, classes, like, much, very (.)