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7若皮肤经常与油料接触时，会产生（）等病状。
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项目变更的三大起因是：就如何达到项目目标进行初次评估时出了错有了关于可交付成果的新信息新的要求（）
Many of the activities performed during the preliminary investigation are still being conducted in(1),but in much greater depth than before. During this phase, the analyst must become fully aware of the (2) and must develop enough knowledge about the (3)and the existing systems to enable an effective solution to be proposed and implemented. Besides the(4)for process and data of current system, the deliverable from this phase also includes the(5)for the proposed system.空白（2）处填（）
张某，女，19岁。因急起高热，显著头痛、肌痛、关节痛、乏力、咽干、食欲减退2天，伴鼻塞、流涕。眼结膜及咽部充血，肺部可闻及干啰音，拟诊"流行性感冒"。该病传染期一般持续（）
345型链锯的电刷的作用（）。
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