下面两个图分别是人眼球结构示意图,照相机结构示意图,请据图回答.
——Which sport do you like better, swimming or playing basketball?——I prefer ______ to _______. I don't like water sports.
如图,在□ABCD中,延长AB到点E,使BE=AB,连接DE交BC于点F,则下列结论不一定成立的是( )