对下面①和②两个结构简式的说法中,正确的是( ) A.①是2,3-二甲基-2- 发布时间:2017-05-25 22:03 │ 来源:www.tikuol.com 题型:选择题 问题: 对下面①和②两个结构简式的说法中,正确的是( )A.①是2,3-二甲基-2-乙基丁烷 ②是3,3,4-三甲基戊烷B.①②互为同系物C.①②是同一种物质D.①②互为同分异构体
题型:选择题 按要求写句子。1. My hair is long. Mary's hair is longer. (合为一句) ______________________________________2. Peter is funny. Paul is funny, too. (同上) ______________________________________3. Do they look the same? (作否定回答) ______________________________________4. of, both, like, don't, them, physics (连词成句) ______________________________________5. look, different, they, in, ways, some (同上) ______________________________________ 查看答案