题目内容
下列关于社会保险的说法错误的是()。
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空间力偶矩是（）。
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（1）处应选择（）
男，16岁。因阑尾炎穿孔术后持续发热半个月。右上腹及右肋缘下疼痛，并向右肩部放射，摄片示右侧胸腔积液。考虑（）
根据静水压强的特性，静止液体中同一点各方向的压强：（）
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