从东向西横跨太平洋航行并带领船队完成了人类历史上第一次环球航行的人是 。
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大航海时代的开启是因为陆路的 贸易被垄断,欧洲转人向海洋寻求出路的结果。
Hard disks are permanent or nonvolatile storage.
A. 对
B. 错
Using RAM, data and programs can be retained after the computer has been shut off.
A. 对
B. 错
All utility programs belong to the application software.
A. 对
B. 错