使用more命令查看文件内容时，要退出则需要按什么键（ ） A: Q B: q C: e D: Space

Listen to the speech on being a boss. Q: What will the boss possibly do with the employee? A: The boss will promote the employee. B: The boss will give the employee more money. C: The boss will fire the employee. D: The boss will hire more employees.

Q:What is the present situation about Americans' communting to work? A: More and more Americans spend over an hour getting to work. B: Over 10 percent of Americans spend less than an hour getting to work. C: Only New York people spend more than 90 minutes getting to work. D: Over 10 percent of Americans spend more than 90 minutes getting to work.

While rich parents are more concerned with their children’s psychological well-being, poor parents are more worried about their children’s safety. A: A B: B C: C D: D E: E F: F G: G H: H I: I J: J K: K L: L M: M N: N O: O P: P Q: Q

A:Good morning. Can I help you? B:Yes. I want to stay here one more night. Q:What do we know about the man? ( )

Graying means paying more for _______, more for _______, more for _______, more for _______.

___ he read the book, ____ he got in it. A: The more; the more interesting B: The less; the more interesting C: The more; the more interested D: More; more interested

It's raining ________. A: more and more heavily B: heavier and heavier C: more and more heavy D: more heavy and more heavy

关于“more命令”中常用快捷键的操作，说法正确的是（）。 A: ENTER键：一次移动一行。 B: 空格键：向下移动一个屏幕。 C: 空格键：向下移动10行。 D: q：退出more命令并返回操作提示符下。

下列关于Linux命令说法正确的是（） A: cat<文件>查看全文 B: more<文件>空格：向下b：向上q：退出 C: less<文件>空格：向下b：向上q：退出 D: head<文件>默认查看前8行