A:①②
B:①③
C:②④
D:①④
如图所示,在光滑的水平面上有甲、乙两物体,初速度为0,在力F1、F2作用下运动,已知F1<F2( )
某城市经纬度分别为120°W,30°N,如图中表示此城市正确位置的是( )
The man______of shooting 6 school children was caught by Beijing police,the XIN HUA News Agency reported on Friday.( )