在酶的活性中心以外使酶表现催化活性所必须的部分被称为（），它的作用是（）。
题型：填空题
问题：
在酶的活性中心以外使酶表现催化活性所必须的部分被称为（），它的作用是（）。
题型：填空题
阅读理解。
We think with our head. But can computers think?
Does a computer have a head? We can use a computer to calculate, play games, send emails, do
homework and other things. A computer has several parts.
Which part is the head of the computer? In the main part of the computer, there is an element (元件)
called CPU. That's the head of a computer. The keyboard and mouse are like a man's eyes and ears.
They can get the information from the outside. And the monitor and printer are like a man's hands and
mouth. They can send the information to the outside after the head-CPU thinks about it.
We often use a computer. We use the keyboard and the mouse to give a computer some information.
Then the computer sends the information to CPU. After CPU thinks about it, the computer gives the
result (结果) to the monitor. Then we can see it!
1.We know from the passage the "head" of a computer is the_____.
A. monitor
B. mouse
C. printer
D. CPU
2. We can use a computer to _____.
A. send emails
B. look after babies
C. play games
D. A and C
3. The keyboard and mouse are like a man's _____.
A. head and eyes
B. eyes and ears
C. hands and mouth
D. eyes and mouth
4. Which of the sentences is NOT right?
A. We can calculate with a computer.
B. The keyboard and mouse can get information from the outside.
C. The monitor and printer are like a man's hands and feet.
D. We can get some information from the monitor.
5. Which picture is right to describe how a computer works?
