题目

一人立于平面镜前，人和像的距离是４米，则人和平面镜的距离是_____米， 若像相对人的速度为0.6米/秒，则３秒内人移动了_______米． 答案：2；0.9；The reason ________ he gave for not coming to your birthday party is ________ his mother was ill．A.what; whichB.why; thatC.as; whichD.which; that