读《滕王阁序》,下列解说错误的一项是( )
阅读理解,根据短文内容选择最佳选项。
Today is Saturday. It's rainy. John's family is at home. His father Mr Jones is reading a book in the study. His mother is cooking in the kitchen. His brother Tom and his friend Mike are playing computer games in the bedroom. His grandpa and grandma are watching TV in the living room.
已知:PH∥AE,PK∥BC,DE=100米,EA=60米,BC=70米,CD=80米.以BC所在直线为x轴,AE所在直线为y轴,建立平面直角坐标系,坐标原点为O.