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当前学科:催化重整装置(中级工)
题目:
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脱戊烷油折光率要求不小于()n20D,折光率越高,则说明芳烃含量越高。
A . A:1.3900
B . B:1.4200
C . C:1.4970
D . D:1.3920
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