听力原文:A: What's wrong with your new electric cooker? Let me see if I can fix it. B: Oh, I had the shop replace it with a new one this morning. What did the woman do this morning?
【简答题】The design moment for a R.C. beam of b × h=2 0 0 mm × 600 mm is M= 30 0 k N · m , t he concrete is of grade C30 (α 1 =1.0, f c =1 4.3 N/mm 2 , f t =1. 43 N/mm 2 ) , the steel is of grade HRB 400. (f y...
【简答题】• The design moment for a R.C. beam of b × h=250mm × 450mm is M=132kN·m, the concrete is of grade C40( α 1 =1.0 , f c =19.1N/mm 2 , f t =1.71N/mm 2 ) ,the steel is of grade HRB400.(f y =360N/mm 2 , ξ ...