16. Most computer users want to know how the computer mouse works.
A. Right
B. Wrong
C. Not mentioned
17. According to the author,general computer users need not to know how the computer mouse was invented.
A. Right
B. Wrong
C. Not mentioned
18. The computer mouse derives its name from the cable that goes out its body, which looks like the tail of a mouse.
A. Right
B. Wrong
C. Not mentioned
19. The key components of a computer mouse are the two LEDs.
A. Right
B. Wrong
C. Not mentioned
20. When an ordinary computer mouse gets dirty,it has to be replaced with a new one.
A. Right
B. Wrong
C. Not mentioned
21. The most durable computer mice on sale are the IBM ones.
A. Right
B. Wrong
C. Not mentioned
22. The optical mouse is superior to the basic one in that the former has no moving parts.
A. Right
B. Wrong
C. Not mentioned