函数f(x)=x2-1log2(x-1)的定义域是______．
题型：填空题
问题：
函数f(x)=
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题型：填空题
阅读理解。
Students learn their lessons in class. In class teachers teach them. Students sit in the classroom listening.
This is a way of learning. Is this the only way for students to learn something? Of course not. There is
another way to learn. That is, students can teach themselves. For example, if you can not remember
something when you are doing your homework, you can look at your book to find the answer. This is a
way to teach yourself. And it is not a difficult thing. We can do this at any place and at any time.
How do you teach yourself? The first thing you must do is reading. Read something you are interested
in, or you have to read. The second is that you must ask yourself questions. If the question is something
you don't understand or you want to know more about, you can write down these questions. The third is
to answer the question yourself by thinking hard, by reading the text or 
other books, and sometimes by
asking other people. This is the way of teaching yourself. And you must do this all by yourself. If you keep
doing like this for a long time. 
You are sure to succeed (成功) in your study.
l. Listening to the teacher is _____ for students to learn something.
A. not a way
B. the best way
C. the only way
D. not the only way
2. Which of the following is right?
A. A student can teach himself only in class.
B. It is a bad way to learn from the teacher.
C. A student can learn to teach himself if he wants to.
D. Students know very well how to teach themselves.
3. In teaching yourself, the first thing you must do is _____ .
A. writing
B. reading
C. asking
D. answering
4. A clever student usually likes _____ .
A. asking questions
B answering questions
C. finding answers
D. teaching others
5. If you want to succeed, you'd better learn_____ .
A. how to teach others
B. how to teach yourself
C. to read and write carefully
D. how to ask questions
