在同一平面內(nèi)畫5條直線最多可有幾個交點,n條呢
甲車行的路程比乙車多 而乙車用的時間比甲車少 則甲、乙兩車速度比為7:10。請判斷對錯
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 (長方形A的周長) is 70 meters.If the length (長) is increased (增加) by 10\3 and the width (寬) is reduced (減少)by 2\5,we get Rectangle B.But the perimeter of Rectangle B remains (保持) the same.So the area (面積）of Rectangle A is_________m2.