10.如图1,OM∥AB,点P在由射线OM、线段OB及AB的延长线围成的阴影区域内(不含边界),且,则实数对(x,y)可以是 A.() B.()C.() D.() 答案:C解析:据平面向量基本定理,和平行四边形法则A() = P在下方.B() P在O的边界上.D() P在延长线上方,故选CAlthough ____ money at that time , my parents managed to send us to university. A,lacked in B,lacking of C,lacked D lacking