A:(1,10)
B:(5,6)
C:(10,12)
D:(20,24)
某同学在做“验证力的平行四边形定则”实验时,根据测量结果在白纸上画出如图所示的图,其中O为橡皮筋与细绳的结点.
We're busy because we have so housework to do today.