A:3
B:932
C:332
D:3 3
下图为某生态系统能量流动示意图,依图判断不正确的是( )
“Do be a ____ (help) person!” my father always says to me.
如图,矩形ABCD中,点E,F,G,H分别在边AB,BC,CD,DA上,点P在矩形ABCD内.若AB=4cm,BC=6cm,AE=CG=3cm,BF=DH=4cm,四边形AEPH的面积为5cm2,则四边形PFCG的面积为( )