题目

 It's certain that we are ________ to having a clean and beautiful home in the future because some special projects are ________ to protect the environment. A. under way; on the way  B. in the way; on the way C. on the way; by the way  D. on the way; under way 答案：D如图，以A为位似中心，将△ADE放大2倍后，得位似图形△ABC，若 表示△ADE的面积，表示四边形DBCE的面积，则="           " （   ）A．1︰2B．1︰3C．1︰4D．2︰3