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设z=esinxy，则dz=______．

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在Windows 98环境下，创建多重启动配置时需修改MS-DOS.SYS文件。如果要在机器启动时自动显示启动菜单，则应在MS-DOS.SYS文件中使用命令【】。

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In proposing such philanthropic donations, the director of the company certainly spoke from a genuine concern for the needy and not any desire for personal accolades.A.such philanthropic donationsB.fromC.for the needyD.any desire

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