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酮的一般表达式可写为
A、RCOOR'
B、ROR'
C、RCOR'
D、ROH
E、RCHO
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羧酸衍生物发生亲核取代反应的活性次序哪个是正确的?A.RCOCl > RCOOR’> RCOOCOR’> RCONH2B.RCOCl > RCOOCOR’> RCOOR’> RCONH2C.RCONH2 > RCOCl > RCOOR’> RCOOCOR’D.RCONH2 > RCOCl > RCOOCOR’> RCOOR’
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羧酸衍生物发生亲核取代反应的活性次序为()A.RCOCl > RCOOR’> RCOOCOR’> RCONH2B.RCOCl > RCOOCOR’> RCOOR’> RCONH2C.RCONH2 > RCOCl > RCOOR’> RCOOCOR’D.RCONH2 > RCOCl > RCOOCOR’> RCOOR’
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羧酸衍生物发生亲核取代反应的活性次序是哪一个?A.RCONH2 > RCOCl > RCOOCOR’> RCOOR’B.RCONH2 > RCOCl > RCOOR’> RCOOCOR’C.RCOCl > RCOOCOR’> RCOOR’> RCONH2D.RCOCl > RCOOR’> RCOOCOR’> RCONH2
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“x是小于10 的非负数”,用MATLAB表达式可写为()A.0<=x<10B.0<=x x<10C.0<=x or x<10D.0=
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