A,B两木块质量分别为mA和mB,-|||-且=2mA, 两者用一轻弹簧连接后-|||-静止于光滑水平桌面上,若用外力将两木块压近-|||-使弹簧被压缩,然后将外力撤去,则此后两木块-|||-运动动能之比 dfrac (EA)(EFB) 为[]-|||-(A) dfrac (1)(2)-|||-(B) dfrac (sqrt {2)}(2).-|||-(C) sqrt (2).-|||-(D)2.A,B两木块质量分别为mA和mB,-|||-且=2mA, 两者用一轻弹簧连接后-|||-静止于光滑水平桌面上,若用外力将两木块压近-|||-使弹簧被压缩,然后将外力撤去,则此后两木块-|||-运动动能之比 dfrac (EA)(EFB) 为[]-|||-(A) dfrac (1)(2)-|||-(B) dfrac (sqrt {2)}(2).-|||-(C) sqrt (2).-|||-(D)2.