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问题 单项选择题

翼突支柱将咀嚼压力传导至颅底是通过

A．蝶骨翼突，上颌骨牙槽突的后端

B．上颌骨腭突，腭骨垂直部

C．颧牙槽嵴，上颌牙槽突的后端

D．腭骨垂直部，颧牙槽嵴

E．蝶骨翼突，上颌骨腭突

答案

参考答案：A

解析：翼突支柱由蝶骨翼突与上颌骨牙槽突后端连接而成。

单项选择题

Ravi, like many project （）, had studied the waterfall model of software development as the primary software life-cycle （）. He was 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 （） and not as （）.

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 suitable, an existing process must be （） 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.

something that implied that the system had to be delivered and built in （）

A．parts

B．modules

C．soil-ware

D．a whole
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问答题 简答题

为什么净化停气后在甲醇循环不停的情况下，气提氮不停？
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