问题
单项选择题
使酸性和解离度增加的是（）
A.烃基
B.羰基
C.羟基
D.氨基
E.羧基
答案
参考答案：E
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使酸性和解离度增加的是（）
A.烃基
B.羰基
C.羟基
D.氨基
E.羧基
参考答案：E
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John: Nice to meet you, too! Judy: Can I ask you some questions? John: Sure. Judy: How do you usually get to your school? John: 2 And you? Judy: I usually get to school by bus. 3 John:10 minutes' by bus. How about you? Judy: Me? Oh, I need 20 minutes' walk. By the way , 4 John: Only half an hour. We often have a little homework every day. Judy: Really? How lucky you are! I often have a lot of homework to do every day. I need to spend an hour doing my homework. John: I think you should talk with your teachers about it. Judy: 5 | ||||||||||||
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