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问题 选择题

干冰气化时，下列所述内容发生变化的是(　　)

A．分子内共价键

B．分子间的作用力

C．分子间的距离

D．分子内共价键的键长

答案

BC

干冰气化时，分子间距离增大，分子间作用力减小，而分子内的共价键没有变化。

单项选择题 A1型题

两脏同病多表现为气血两虚的是（）

A.心与肺

B.心与肝

C.心与脾

D.心与肾

E.肺与肝
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单项选择题 案例分析题

Ravi, like many project (1) , had studied the waterfall model of software development as the primary software life-cycle (2) . He has all set to use it for an upcoming project, his first assignment. However, Ravi found that the waterfall model could not be used because the customer wanted the software delivered in stages, something that implied that the system had to be delivered and built in (3) and not as (4) . The situation in many other projects is not very different. The real world rarely presents a problem in which a standard process, or the process used in a previous project, is the best choice. To be the most situation, an existing process must be (5) to the new problem. A development process, even after tailoring, generally cannot handle change requests. To accommodate change requests without losing control of the project, you must supplement the development process with a requirement change management process.

空白（5）处应选择（）

A.modified

B.used

C.suited

D.tailored
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