【romram】用英语介绍ram和rom的区别

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【答案】 Read-only memory or ROM is a form of data storage in
　　puters and other electronic devices that can not be easily altered or
　　 reprogrammed. RAM is referred to as volatile memory and is lost when
　　the power is turned off whereas ROM in non-volatile and the contents are
　　 retained even after the power is switched off.
　　Random Access Memory or RAM is a form of data
　　storage that can be accessed randomly at any time, in any order and from
　　 any physical location in contrast to other storage devices, such as
　　hard drives, where the physical location of the data determines the time
　　 taken to retrieve it. RAM is measured in megabytes and the speed is
　　measured in nanoseconds and RAM chips can read data faster than ROM.