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Listen and fill. 听录音，填写表格。 Message Note1. To:_____.2. From:_.3. Phone number:_.4. Message: Mr Green wants to talk about the_ of the new products.He would like you to_______ him back as soon as possible.

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Listen and order. 听录音，排序。 A. OK. See you tomorrow.B. Yes. I'm available tomorrow afternoon. What time is suitable for you?C. Professor Wang, could I make an appointment with you for tomorrow?D. No, I don't.E. It's Room 316, in Building E.F. See you!G. How about 3 o'clock.H. Fine. Do you know where my office is?

Linux系统中存放加密用户帐号信息的文件是（）。

A. /etc/passwd
B. /etc/shadow

你给公司的新同事添加一个用户,你起初指定他的帐号在30天后过期,现在想改变这个过期时间,用下面哪个命令()。

A. usermod-a
B. usermod-d
C. usermod-x
D. usermod-e

以下()文件保存用户账号的信息。

A. /etc/users
B. /etc/gshadow
C. /etc/fstab
D. /etc/shadow