计算机英语句子

　　1.Disks for computer come in two main types, floppy and hard.

　　计算机所有磁盘主要有两类，软盘和硬盘。

　　2.A hard disk is usually fixed inside the computer unit and can hold vast quantities of information60.80.100 million characters and more.

　　硬盘一般固定在主机内部了，可存60M,80M,100M 字符甚至更多的信息。

　　3.When you want the computer to read information from a floppy disk or write information on it, you insert the disk in your floppy disk drive.

　　当你要计算机读写软盘时，你要把它放入软盘驱动器(亦称软驱)中。

　　4.Floppy disks are available in two sizes, 5.25-inch and 3.5-inch.

　　软盘有5.25英寸和3.5英寸两种尺寸。

　　5.The floppy disk drive is designed to work with disks that can hold a specific amount of information, so you should know which dis capacity works best with the disk drive.

　　软盘驱动器为适于特定容量的磁盘而设计，所以要知道在软驱上使用多大容量的软盘最好。

　　6.On each side, a disk is divided into circular regions called tracks. A floppy disk has either 40 or 80 tracks per side.

　　软盘每一面上划分成的环形区域叫作道。软盘分每面40道和80道两种。

　　7.Each track on each side of a disk is further divided into segments called sectors.

　　每面上每道又进而划分成扇区。

　　8.The following table shows the number of tracks and sectors on floppy disks of standard sizes and capacities.

　　下表给出标准尺寸和容量的软盘道数和扇区数。

　　Standard Floppy Disk Formats(标准软盘格式)

　　(软盘尺寸)5.25inches 5.25inches 3.5inches 3.5inches 3.5inches

　　(盘容量) 360KB 1.2MB 720KB 1.44MB 2.88MB

　　(每面道数)40 80 80 80 80

　　(每道扇区区数)9 15 9 18 36

　　9.Whenever you give MS-DOS a command, you type it and press the Enter key.

　　当你向MS-DOS发命令时，敲入命令并按Enter键。

　　10.MS-DOS includes a command called Memory (shortened Mem) that allows you to check on the amount of available memory in your system.

　　MS-DOS 包括一条命令叫Memory(缩为Mem)，让你检查系统内存可使用的内存量。

　　11.To use the command, you type it in the following shortband form.

　　C:\mem

　　and tben press Enter

　　使用此命令，要敲入下列的简化形式：

　　C:\mem

　　然后按Enter键。

　　12.Suppose you type mom instead of mem:

　　C:\mom

　　after you press Enter, MS-DOS responds:

　　Bad command of file name

　　and redisplays its prompt:

　　C:\

　　假设你敲了mom而不是mem，按Enter键后，MS-DOS作出的反应(提示)是Bad command of file name(

　　错误的命令或文件名)，并重新显示提示符。

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