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发布时间:2023-10-05 13:29:48

[单选题]
He was very much interested in the work of charities, and made a regular ________ to them.
A.
Hospitality
B.
Dedication
C.
Fellowship
D.
Contribution

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[单选题] He ______ work late on weekends.
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[单选题]CH3-CH2-CH2-CH3 (800℃)→ CH4 + CH2=CH -CH3的反应属于烷烃的( )。
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[单选题]CH3C00CH2CH(CH3)2+CH3OH→CH3C00CH3+(CH3)CHCH2OH属于酯的()。
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[单选题] I don’t like him ______ he smokes too much.
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C.3-甲基-2-乙基-1-丁烯
D.2-甲基-3-乙基-1-丁烯

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