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（2）如果电视机或投影仪是近几年购置的产品，一般都是可以安装第三方软件的，甚至有些会内置投屏软件。 这时候就不需要另外购买外置设备也能使用投屏功能。 无论选择哪种方式，只要根据厂商的 …

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Option 2: At the top right, click More . In the expanded menu, next to “Show original page,” click the switch to change between the original and translated website.

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2-Step Verification for your child's account If your child has 2-Step Verification turned on for their account and you change their password, 2-Step Verification gets turned off. After 2-Step Verification …

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其中 I 是单位矩阵。求逆矩阵通常可以通过以下几种方法： 1. 高斯-约当消元法 这是最常用的方法，通过行变换将矩阵 A 转换为单位矩阵，同时对单位矩阵进行相同的行变换，最终单位矩阵变为 A^-1。 2. …