Наука и техника
* @param arr 待排序数组
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Magic Keyboard for iPad Air provides an amazing typing experience and expands what users can do, with a built-in trackpad ideal for precision tasks like selecting text, and a 14-key function row that allows easy access to features like screen brightness and volume controls. It attaches magnetically, and the Smart Connector immediately connects power and data without the need for Bluetooth; a machined aluminum hinge also includes a USB-C connector for charging. Magic Keyboard for iPad Air has a magical floating design customers love, and comes in black and white.