自上而下选用框架具有质量高，框架完善容易，思考速度快等特点，它是先收敛再发散的过程。目的是找一个完整结构，然后围绕结构做“问题细化”。 To supply the top activities, we use technologies like cookies to keep and/or entry device information and facts. Consenting to those technologies allows us to procedure data like searching habits or exclusive IDs on this site. Not consenting or withdraw... https://www.metooo.io/u/godovietnam