题目

下列有机物的命名正确的是（    ）   A． 3,3-二甲基丁烷    B．3-甲基-2-丁烯 C． 2-乙基丁烷        D． 名称为1，4-二甲苯  答案：D解析: The film Youth many people and some of them couldn’t help crying while watching it.A. touched B. caught C. felt D. reached