已知轴心拉力设计值N=82kN，木材为红皮云杉，孔洞尺寸如题图，该构件的轴心受拉承载力计算的计算式与下列（）项表达式最为接近。

A．σ_t=7.8N/mm²＜f_t=8.0N/mm²

B．σ_t=6.5N/mm²＜f_t=8.0N/mm²

C．σ_t=7.8N/mm²＜f_t9.5N/mm²

D．σ_t=6.5N/mm²＜f_t=9.5N/mm²

—Do you know how the old couple spend their evening?  

—They seem              in front of the television.    [ ]

A. content to sitting        

B. to content to sit    

C. content to sit            

D. to content to sitting