单项选择题

What’s the main idea of this passage（）

A．The development of electronic computer.
B．How to operate a computer
C．What’s the use of computers
D．What do the scientists and technicians do about computers

<上一题目录下一题>

热门试题

单项选择题

As they searched the room, they looked for（）to the crime.

A. labels
B. scenes
C. clues
D. tags

单项选择题

Robots are used （） a lot of work in place of man.

A. to do
B. to doing
C. doing
D. to be done