获取当前登录服务器的主机地址及用户名使用（）函数。 A: USER() B: SYSTEM_USER() C: SESSION_USER() D: CURRENT_USER()

00a0a user name and password Sign in to the system

43. The VDR system is designed to operate ____once it is set up correctly. There is no user interaction.

6. Our system has been designed to give the user quick and easy ________ to the required information.

The kernel is defined as: A: The graphical user interface on top of the operating system B: The glue between the hardware and applications C: The software libraries needed to run the system D: All of the above

Czerwinski found that no other change to a computer system could more significantly improve a user’s productivity than ______.

下列属于IAD登录账号的是（） A: root B: system C: admin D: user

The user must interact with the （） in order to accomplish task. A: printer B: memory C: CPU D: operating system

A user’s print jobs default to PRINTER_A.The user wants to change their default printer to PRINTER_B.How can the system administrator change the user’s default printer to PRINTER_B？（） A: Execute the command ’piobe -q PRINTER_B’ B: Edit the user’s stanza in the /etc/qconfig file C: Execute the command ’chuser -a QUEUE=PRINTER_B user’ D: Add the line ’export PRINTER=PRINTER_B’ to the user’s .profile

Form and function go hand in hand and the best structural system is the one that fulfills most of the needs of the user while being .