题目内容
命令pwd可以输出当前所在工作目录的绝对路径，这个路径也用作相对路径的参考点。
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命令cd后面的访问路径，既可以是要访问的目标的绝对路径，也可以是相对路径。
在root用户下执行命令“cd ~”是指切换到/root目录。
Welcome to Courtyard Hotel. It is our pleasure to welcome you as our guest and to wish you (1) here. It is very important to us that your stay should be as comfortable and as enjoyable as possible. We take great pride in providing our guests with the highest levels of professional service and hospitality. And it is (2) to meet your expectations.A comfortable stay is always a more productive one. So if there is anything we can do to make your next trip more pleasurable, (3) to tell us about it. To share your feedback, dial 0 to reach (4) or fill out the comment card in your room and give it to a member of our staff. Thank you for (5) .
1. Patterns that are invisible on the ground can be the most striking part of an_____ photograph.
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