题目内容

事件是在某个特定时刻发生的事情,它是对引起系统做动作或(和)从一个状态转换到另一个状态的外界事件的抽象。

A. 对
B. 错

查看答案
更多问题

在下列化合物中,最容易进行亲电加成反应的是

A. CH3CH=CHCHO
B. CH2=CH-CH=CH2
CH2=CHCl3
D. CH3CH=CHCH3

在丙烯的自由基卤代反应中,对反应选择性最好的是

A. F2
Br2
Cl2
D. I2

下列化合物酸性最强的是

A. CH3CH2CH3
B. CH3CH=CH2
CH3CH=CH
D. CH=CH

C: Besides, I-【1】-, these cost $900.M: Well, then that’s not pain, that’s karma. Look, i will help you out, okay? -【2】-.C: Like a Barney’s warehouse?M: kind of.C: The Goodwill?M: -【3】-.C:-【4】-. You led me to believe we were real shopping.M: I know. I wouldn’t wait to see your face when you saw the place. Do the face again. I love it.C: Okay, what’s that smell?M: It’s gonna be your smell from now on. Now, pay attention, I know where the good stuff is.C: I know where the good stuff is. Madison and 57.M: Clever bitches hide stuff they want to come back and buy ‘cause sometimes they don’t have $3 to buy it at the time.C: -【5】-.M: You!

答案查题题库