【判断题】2- 丁烯与 HCl 的加成反应为亲电加成,生成物可用马氏规则指导写出。
【判断题】2- 丁烯与 HCl 的加成反应为亲电加成,生成物不需要用马氏规则就可写出。
【简答题】把下面的句子变成一般疑问句。(拍照上传) I never get up early on Sundays. Last Sunday I got up very late. He looked out of the window. It was dark outside. It's raining again. The telephone rang. It was my aunt Lucy. I'm...
【单选题】It was my aunt Lucy.
【判断题】全车线路中 各个 用电设备均并联由各自的开关控制。
【判断题】微机溜放进路控制设备中取消了继电器电路。