【单选题】5 / 7若 Njx=3600 kNN_{jx}=3600\,\mathrm{kN}Njx=3600kN,N=1200 kNN=1200\,\mathrm{kN}N=1200kN,则 KKK 为?A0.330.330.33B222C333正确D4.54.54.5参考答案C参考解析K=3600/1200=3K=3600/1200=3K=3600/1200=3。