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问题 选择题

淀粉溶液遇碘变蓝色。实验表明，无论是固体碘还是碘蒸气，均能使淀粉溶液变蓝色。这一事实说明 [ ]

A．分子在不停运动

B．分子间有一定的间隔

C．同种分子性质相同

D．同种分子运动速度相同

答案

答案：C

单项选择题

以下什么游戏特点出现在幼儿期中？（）

A．单独性游戏

B．平行性游戏

C．合作性游戏

D．联合性游戏

E．随意性游戏
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单项选择题

Many of the activities performed during the preliminary investigation are still being conducted in （）, but in much greater depth than before. During this phase, the analyst must become fully aware of the （） and must develop enough knowledge about the （） and the existing systems to enable an effective solution to be proposed and implemented. Besides the （） for process and data of current system, the deliverable from this phase also includes the （） for the proposed system.

the deliverable from this phase also includes the（）for the proposed system.

A．hardware and software specification

B．system performance specification

C．formal requirements definition

D．general problem statement
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