不论当前目录处在哪一级子目录，CD\命令都可无条件地返回根目录。
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They still have some problems（）in designing the new energy vehicles.
A. overcome
B. overcoming
C. to overcome
D. overcomes
文件目录结构如下图所示：C：\├—CAI<目录>├─USER<目录>├─LX<目录>│ ├─AAA.TXT 文件 设当前提示符为C：\>，请写出删除AAA.TXT文件的命令。
汉字系统只是将英文操作系统翻译成汉字，它属于操作系统。
A. 对
B. 错
The passage is mainly about（）
A. how to keep your employees
B. the importance of key employees
C. how to challenge your employees
D. the difference between push and pull
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