A. 使程序运行加速 B. 使系统启动加快 C. 快速启动程序和打开文件的捷径 D. 快速打开菜单
A. 维持运行 B. 更换机车 C. 减速运行
A. increased engine breathing efficiency B. excessive valve lash C. excessive lube oil consumption D. lower than normal fuel consumptio
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