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【多选题】
关于加氢裂化催化剂助剂的功能,下列说法不正确的是()。
A.
提供加氢活性
B.
提高比表面积
C.
提供酸性和稳定性
D.
改善加氢活性,改善表面结构和提高酸性
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【单选题】Which of the following titles best suits the passage?
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The Causes of Earthquakes
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Earthquake Experiments in the U. S.
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Earthquake Forecasting and Control
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B.
we must make every effort to solve the problem of unemployment
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A.
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B.
allocate the psychological reward to most employees in a company
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have access to a higher position and a satisfying salary in a company
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A.
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B.
impossible factors leading to greater efficiency
C.
to what extent more money leads to greater productivity
D.
how to make workers' jobs more interesting
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A.
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B.
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education is not necessary for some people
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