Nigeria, a major West African country, is nearly        Great Britain.[ ]

A. three times the size as

B. three times the size of

C. three times as the size

D. the size three times of

从地面竖直上抛一个质量为m的小球，小球上升的最大高度为H.设上升过程中空气阻力为F恒定.则对于小球上升的整个过程，下列说法错误的是（）

A.小球动能减少了mgH

B.小球机械能减少了FH

C.小球重力势能增加了mgH

D.小球加速度大于重力加速度g