单项选择题
A. follow the fashion B. dress up in beautiful clothes C. do more exercises D. enrich their mind
Laser-doppler radar ()A. makes use of microwavesB. meas...
单项选择题Laser-doppler radar ()
A. makes use of microwaves B. measures the movements of a spaceship by means of light beam C. makes use of sound waves D. Both A and B
No matter how hard he worked, ()A. he could not do any ...
单项选择题No matter how hard he worked, ()
A. he could not do any better B. and he could not do any better C. so he could not do any better D. but he could not do any better
They have two teams, and () have a good chance of winni...
单项选择题They have two teams, and () have a good chance of winning.
A. all B. either C. both D. each
