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【单选题】
The mechanism of aspirin (阿司匹林) preventing thrombosis isA.
Excitation of COX, and inhibition of platelet aggregation
B.
Inhibition of COX, and excitation of platelet aggregation
C.
Inhibition of COX, and inhibition of platelet aggregation
D.
Excitation of COX, and excitation of platelet aggregation
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反馈参考答案：
举一反三
【单选题】下列加点词语的解释不正确的一项是( )
A.
猝不及防：猝，突然，出其不意。
B.
迟疑：犹豫；拿不定主意。
C.
哽咽：咽：声音阻塞，多指哭泣。
D.
莫名其妙：名，明白
【单选题】As is often the _______, the h ousewife gives the house a thorough cleaning ________. [ ]
A.
matter; every two days
B.
situation; each second day
C.
same; each two days
D.
case; every second day
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