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问题 单项选择题

用0.10mol/LHCl滴定0.10mol/LNa2CO3至酚酞终点，这里Na2CO3的基本单元数是（）。

 

A．Na2CO3

B．2Na2CO3

C．1/3Na2CO3

D．1/2Na2CO3

答案

参考答案：A

补全对话，情景问答

补全对话。

Joan : Ann ,      1    

Ann:The future? Well,l think we'll study at home on computers. And       2    

Joan:You think so? What else will we do?

Ann:      3      

Joan:Where will we be able to go on vacation?

Ann:      4      

Joan:The moon?     5      

Ann:Because it's much more interesting on the moon than on the earth!

A. we don't have to go to school.

B. Why don't we take vacations on the earth?

C. We'll take long vacations,too.

D. what do you think of the future?

E. To the moon!

1.             2.             3.             4.             5.         

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单项选择题

J.Martin指出，应该结合数据的战略规划进行必要的业务规划，并以企业模型图来表示，而其中以一个动词来命名的最低层被称为( )。

A．过程
B．职能
C．功能
D．活动
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