当汽车上坡时,驾驶员往往换低档减速行驶,这是为了()
A:减小汽车动能,增大势能
B:增大汽车爬坡牵引力
C:节约汽油,保证安全行车
D:提高发动机的效率
Bob knows how to cut the cost of the project. I'm sure he can do the work with _____ money and ______ people.
Rt△ABC中,∠C=90°,tanA=35,BC=5,则AB=( )
--- That's a good idea. Let's them.