下列各组物质互为同分异构体的是 [ ] A．O2和O3 B．和 C．CH4和CH_爱下问搜题

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问题选择题

下列各组物质互为同分异构体的是 [ ]

A．O₂和O₃

B．和

C．CH₄和CH₃CH₃

D．和

答案

答案：D

选择题

Mary couldn’t remember when she first met Mr. Anderson, but she was sure it was _____ Sunday because everybody was at _______ church.

A．/;the

B．the;/

C．a;/

D．/;a

名词解释

王安石变法