在同一平面内画5条直线最多可有几个交点,n条呢
甲车行的路程比乙车多 而乙车用的时间比甲车少 则甲、乙两车速度比为7:10。请判断对错
There are eighty language teachers in a university.Six-two teachers can speak English,and thirty-five teachers can speak French.We can know________ teachers can only speak English.
The perimeter of Rectangle A (长方形A的周长) is 70 meters.If the length (长) is increased (增加) by 10\3 and the width (宽) is reduced (减少)by 2\5,we get Rectangle B.But the perimeter of Rectangle B remains (保持) the same.So the area (面积）of Rectangle A is_________m2.