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【单选题】
碘量法测定青霉素时空白实验的目的是（）A.
消除温度影响
B.
为了计算方便
C.
消除降解产物等杂质的影响
D.
矫正标准溶液
E.
使与对照品条件一致
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】A. Read and listen to a dialogue or a passage twice andchoose the best answer. The guest is seated and shown the breakfast menu by the hostess. Li Li, the waitress comes to the table to take his order...
A.
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B.
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C.
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D.
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