A:球的水平射程为 v02sinθ2g
B:小球B的抛射角一定为 π2 -θ
C:两小球A,B在空中运行时间的比值为 tAtB=1tanθ
D:两小球A,B上升的最大高度的比值为 hAhB =tanθ
某地的东侧是东半球,西侧是西半球;北侧是温带,南侧有极昼、极夜现象,该地应位于( )
- Why are you feeling sleepy all the time?
- Because I late watching the film Kung Fu PandaⅢlast night.
Jane sends an email____ ____.
—Will there be more people?
—__________