操作系统的设备管理部分能实现对设备的全面管理,其目的主要有两个,一是为了___________,二是为了防止用户误用外围设备而影响___________。
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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