A.1kgf=9.8N B.1tf=9.8N C.1tf=9.8×103N D.1kgf=0.098N
A.土建施工圖 B.工藝流程圖 C.實(shí)測(cè) D.建筑立面圖
A.40t B.20t C.31.6t D.50t