题目

某有机物A(C8H16O2)能发生下图所示的变化，其中C与F是同分异构体。则符合该条件的A的同分异构体有    A．1种      B．2种      C．3种      D．4种  答案：B解析: The crowd went _______ when they saw the famous star. They were crazy! A．painful B．sensitive C．wild D．confident