一辆m=2000kg的汽车在水平公路上行驶,经过半径r=50m的弯路时,如果车速v=72km／h,这辆汽车会不会侧滑?已知轮胎与路面的最大静摩擦力为1.4×104 N.
—I often see him working hard in his spare time. —________he has won the scholarship from time to time. A. No wonder B. No doubt C. No way
一艘轮船，于2010年1月10日上午10点从上海港起航，经过了7整天后越过印度洋到达伦敦，问到达时到达地的时间是几月几日几点钟?， A.2010年1月16日2时
We all know the importance of curiosity, and here are some tips on how to develop it. Keep an open mind. This is essential if you are to have a curious mind. Be open to learning, unlear
直线l过点( 0，2 )且与双曲线x 2 y 2 = 6的右支有两个不同的交点，则l的倾斜角的取值范围是（ ）（A）( 0，arctan)∪( π arctan，π ) （B）( 0，arctan)（C
--John has got a very good job in the government.--- _____ he looks so happy.A.No doubt B.No wonderC.That's becauseD.It's natural
