Your donations can _____ poor children ____ food and a chance to study.
A. provide; to
B. provide; for
C. provide; with
D. provide; against
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子午线轮胎的滚动阻力系数（）
A. 较低
B. 较高
C. 很低
D. 很高
----- Tina had nothing for breakfast, ____________ she？----- _____________. She had some bread and milk.
A. had, Yes
B. had, No
C. did, Yes
D. did, No
Dad went to buy some __________ as __________ for my cousin.
A. stationery ; souvenir
B. stationeries; souvenirs
C. stationery ; souvenirs
D. stationeries; souvenir
欲使从动轮在硬路面上等速滚动，必须在车轮中心加一推力Fp1它与地面切向反作用力构成一（）来克服。
A. 滚动阻力偶矩
B. 滚动阻力
C. 滑动阻力偶矩
D. 滑动阻力
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