题目

如图，矩形ABCD中，AB=6，AD=8，P是BC上的点，PE⊥BD于E，PF⊥AC于F，则PF+PE=__________．   答案：．  －Did ________get through the driving test?－No，________.A few failed.A. everybody；not all B．anybody；no oneC．everybody；none D．anybody；not all