题目内容

There is an apparent link between lung cancer and vitamin A.

A. Right
B. Wrong
C. Not mentioned

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Major manufacturers have been using "quality circle" with undeniable success for more them

A. 100 years
B. 20 years
C. 50 years
D. 10 years

The oscillator was easier to use, more stable, and less expensive than others available at

A. changeable
B. unchanging
C. diverse
D. strong

Major product categories encompass electronic test and measuring instruments, solid-state

A. round
B. include
C. around
D. and

Companies whose profits do not exceed $ 1500 in any one year may opt to pay income tax at

A. choose
B. operate
C. manage
D. decide

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