______技术利用程序的局部性原理,把程序中正在使用的部分数据或代码存放在特殊的存储器中,以提高系统的性能。
A.缓存
B.虚拟存储
C.RAID
D.DMA
参考答案:A
角膜本身无血管,其营养主要来源于()、()。
What is the MOST important thing you should do before transmitting on a marine radio? ()
A.Ask for permission
B.Record the time in your radio log
C.Press the push to talk button three times
D.Monitor the channel to insure that it is clear