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【简答题】
自身输血简便安全有效,它主要有以下几种形式术前预存输血、血液稀释回输和术中( )。
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反馈参考答案：
举一反三
【简答题】人体电阻一般为多少欧姆?与皮肤状态有何关系?
【简答题】试述DNA分子的双螺旋结构特点。
【单选题】Radio and cinema had one novelty in common: they were forms of communication which dispensed with the written word. The written word had gone hand in hand with civilization from the beginning. Now, th...
A.
used headlines
B.
communicated news
C.
did without writing
D.
advertised through newspapers and magazines
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