从汽油机速度特性曲线中分析可看出:将发动机转速控制有()左右时最少油。
A. 低速
B. 中速
C. 中速偏上
D. 高速
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A System p administrator is attempting to restore some files from a backup tape. The restore failed. The system administrator suspects the block size of the tape drive is incorrect. Which of the following commands can be used to determine the block size of the backup tape ()
A. dd
B. tar
C. cpio
D. restore
3G的数据传输速率是()。
A. 500kbps-700kbps
B. 1.4Mbps
C. 114kbps-2.4Mbps
D. 2.4M