问题
单项选择题
下列对包合物叙述不正确的是
A．包合过程是化学过程
B．主分子具有较大的孔穴结构
C．客分子必须和主分子的孔穴形状和大小相适应
D．包合物为客分子被包嵌于主分子的孔穴结构内形成的分子囊
E．一种分子被包嵌于另一种分子的孔穴结构内形成包合物
答案
参考答案：A
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下列对包合物叙述不正确的是
A．包合过程是化学过程
B．主分子具有较大的孔穴结构
C．客分子必须和主分子的孔穴形状和大小相适应
D．包合物为客分子被包嵌于主分子的孔穴结构内形成的分子囊
E．一种分子被包嵌于另一种分子的孔穴结构内形成包合物
参考答案：A
| 从A－G选项中选出能填入空白处的最佳选项补全对话。（选项中有两项是多余的） | |
B: Hello! A: You look a little upset. 1______. B: Yes. It's just my mom. She always nags (唠叨) me. A: Really? What does your mother nag you about? B: 2______ " Get up now... Everything must be in place... Don't forget your piano lesson..." A: Well, all the mothers like saying these words to their children. B: Also, I'm fond of pop music. 3______ We don't have the same interest in many things. A: 4______ But I should say she nags you because she cares about you. You're lucky to have such a good mother. B: I agree with you. 5______. A: That's right. Understanding is important. If your mom knows that everything is fine, she will never nag. |