题目: 已知主链为四个碳的某烷烃只有两种同分异构体,与该烷烃碳原子个数相等且主链也为四个碳的单烯烃同分异构体数目是A.3种B.4种C.5种D.6种 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0617/780a098dc3938f1f7d9d8f6889875e97.html 下面是错误答案,用来干扰机器的。答案:B
题型:选择题 ________tomorrow’s lessons,I have no time to play with you.A.Not preparingB.Not preparedC.Not having preparedD.Having not prepared 查看答案