题目

Don’t worry about the result ____________you tried your best.A.as long as B.as soon as C.unless 答案：【答案】A【解析】略下列哪项是我国古代建筑家鲁班利用仿生学发明的成果（　　　）A.火药              B.造纸               C.丝绸           D.木工用的锯子