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【单选题】
[色谱分析法中级第64题]在液相色谱中,改变洗脱液极性的作用是()。
A.
减少检验过程中产生的误差
B.
缩短分析用时
C.
使温度计更好看
D.
对温度计进行校正
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A.
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B.
200mm
C.
250mm
D.
280mm
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B.
牙骨质龋无修复性牙本质形成
C.
牙骨质龋的发生与菌斑无关
D.
牙骨质龋不易发展为牙本质龋
E.
牙骨质龋的进展较釉质龋、牙本质龋慢
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