判断题

酯与含有活性亚甲基的化合物在醇钠等碱性催化剂作用下发生缩合反应，脱去一分子醇得到β-羰基化合物的反应叫酯缩合反应。( )

答案：正确

你可能感兴趣的试题

Dialogue
Waiter (W):  1____.
   Guest (G) :  Yes, I think we ‘re ready. My friend would like the lamb and I’d like the fillet steak with fried potatoes and a green salad.
    W:   One lamb and one fillet steak with fried potatoes and a green salad.2 .
    G1:    Oh, medium, please.
    W:       Very good, sir. And would you like anything to start?
    G2:       Yes, I’d like a soup.
    W：      3 madam?
    G2:       Oh, the vegetable soup, I think.
    W:        Vegetable soup, and for you sir?
    G1:       Well, I am slimming. I am not too sure.
W:       4.
G1：   OK, yes
    W:        5_.
    G1:       Yes, we will have Red California.

答案：第1组： 1. ...

单项选择题

下列哪条不属于公共管理伦理的性质（） ‌
‌

A．普适性
B．责、权、利统一性
C．强制性
D．客观性