皮皮学，免费搜题
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【单选题】
华法林的作用机制是 ( )A.
抗血小板聚集
B.
激活抗凝血酶Ⅲ
C.
溶解纤维蛋白
D.
促进纤维酶原激活
E.
竞争性拮抗维生素K
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】A．He found it unbelievable. B．He was not surprised about it. C．He found the troth unacceptable. D．He was arrogant about it.
【单选题】Mary found ________. [ ]
A.
Chinese difficult to learned
B.
Chinese difficult to learn
C.
it difficult to learn Chinese
D.
herself difficult to learn Chinese.
【简答题】When he arrived, he found _________ the aged and the sick at home. A) none but B) none other than C) nothing but D) no other than
【单选题】What did he find on the way?
A.
He found a rich person.
B.
He found a box of good apples.
C.
He found an apple tree.
【单选题】Although it is the first time he takes up such a big task, never ______ afraid of difficulties.
A.
he has been
B.
has he been
C.
has been he
D.
been has he
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