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问题 选择题
下列物质之间的相互关系不正确的是（　　）

A．O2和O3互为同素异形体

B．和互为同分异构体

C．H、D、T互为同位素

D．干冰和冰为不同一种物质

答案

答案：B

补全对话，情景问答
用适当的选项将对话补全。
Jack:  Look at yourself, Tom. You are too fat. You are not fit.     1    
Tom:  What food should I eat then?
Jack:  You should stop eating sweets.     2    
Tom:      3    I like them very much.
Jack:  No, you can't.    4     
Tom:  OK. I will try to do so.
Jack:      5    It can help you be fit, too.

A. And you need to exercise more.
B. What about sweets?
C. You should change your diet.
D. Try to keep healthy.
E. Can I eat hamburgers?
F. You should eat lots of fruit and vegetables.
G. They give you energy but they are not healthy.


1._____  2._____  3._____ 4._____ 5._____
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单项选择题

建立法人治理结构的核心内容是( )。

A．构建有效的控制机制和约束机制
B．建立法人财产制度
C．资产所有权与资产控制权相分离
D．在企业内部构造有效的权力制衡机制
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