A.合理地解決問(wèn)題B.必要地解決問(wèn)題C.針對(duì)性地解決問(wèn)題D.合適地解決問(wèn)題
A.裝飾B.曲線C.直線D.簡(jiǎn)約
A.瓦特B.西門(mén)子C.愛(ài)迪生D.萊特兄弟