圆的半径扩大,圆的面积也随着扩大,所以圆的半径和面积成正比例.______.
圆的面积÷半径=圆周率×半径(不一定),是比值不一定,圆的半径和面积不成正比例.
故判断为:错误.
以攻为守
A. substantial damageB. as differentC. the terrorist attacksD. the city’s economyE. the rest of the nationF. clearly avoidableG. easily noticeable
The terrorist attacks on the city have brought about ______.