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问题 填空题

1g食盐中约有1.04×1022个分子，把1g食盐投入一个水库中，已知水库的蓄水量为4×109m3，如果食盐分子均匀分布在水库的水中，那么每立方厘米的水中约含有                      

答案

2.6×106

单项选择题

假定有下表所列的菜单结构： (表格) 要求程序运行后，如果单击菜单项“大图标”，则在该菜单项前添加一个“√”。以下正确的事件过程是______。

A．Private Sub bigicon_Click() bigicoChecked=False End Sub

B．Private Sub bigicon_Click0 MappeabigicoChecked=True End Sub

C．Private Sub bigicon_Click() bigicoChecked=True End Sub

D．Private Sub bigicon_Click0 appeabigicoChecked=True End Sub
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单项选择题

Accelerated analysis approaches emphasize the construction of （） to more rapidly identify business and user requirements for a new system. As an accelerated analysis technology,（） reads the program code and automatically generates the equivalent system model, and the code can be obtained from （） . All system analysis approaches require some form of （） which includes those techniques to be used to identify or extract system problems and solution requirements from user community. （） is a classical set of techniques used to collect information about system problems, opportunities, solution requirements, and priorities.

Accelerated analysis approaches emphasize the construction of （） to more rapidly identify business and user requirements for a new system

A．object models

B．prototypes

C．use cases

D．components
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