单项选择题
Hofmann重排反应中,经过的主要活性中间体是:
A.苯炔
B.碳烯
C.氮烯
D.碳负离子
Hofmann重排反应中,经过的主要活性中间体是:
A.苯炔
B.碳烯
C.氮烯
D.碳负离子
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单项选择题
They are not likely to agree to _____ propositions.
They are not likely to agree to _____ propositions.
A.other any
B.other all
C.all other
D.other these