凝血酶的主要作用是()
A.加速因子Ⅶ复合物的形成
B.加速凝血酶原酶复合物的形成
C.使纤维蛋白原转变为纤维蛋白
D.激活因子Ⅻ
E.促进血小板聚集
参考答案:C
— It's said that "Titanic" is an exciting film.
— I _____ it yet. I hope to see it soon. [ ]
A. didn't see
B. hadn't seen
C. don't see
D. haven't seen
社会保障包括______
A.社会救济
B.社会福利
C.社会保险
D.目标储蓄
E.谨慎动机