皮皮学，免费搜题
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【单选题】
血液的有效保存期如何制定的?A.
根据红细胞输注人体后24小时存活率为70%以上时保存天数
B.
根据红细胞输注人体后24小时存活率80%以上时保存天数
C.
根据红细胞输注人体后24小时存活率90%以上时保存天数
D.
根据红细胞输注人体后48小时存活率为70%以上时保存天数
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】下列是《金匮要略》的贡献的有
A.
最早设妇科专篇
B.
开创了妇科辨证论治的先河
C.
提出了孕期用药原则
D.
开创了妇产科外治法的先河
E.
记载妇科病的脉法和辨证
【单选题】The waitress showed me to the table we have booked this afternoon.
A.
invited
B.
told
C.
led
D.
pointed
【单选题】—It's a bit cold. Would you mind my _______ all the windows? — Do as you like, please. [ ]
A.
close
B.
will close
C.
closing
D.
to close
【简答题】阅读理解。 Who is there among us who hasn't dreamed of having his or her own small (maybe, several years later), even big business, and having wonderful , both from a boss and from the time clock ; ...
【单选题】It is ______ that caused today's low efficiency.
A.
the rule that we have to stick to our post
B.
the Chinese people's laziness
C.
the heavy work-load
D.
the old time requirement
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