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A Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with (1), and that it has a mechanism for(2) graphical files. Display text, display graphics, and(3) hyperlinks--there's 99 percent of the (4) value. That's not to say that the manufacturers didn't go all-out to attach a hyperactive efflorescence of useless capabilities onto
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某字长为 32 位的计算机的文件管理系统采用位示图(bitmap)记录磁盘的使用情况。若磁盘的容量为 300GB,物理块的大小为 1MB,那么位示图的大小为( )个字。
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