题目内容

A．To visit a recycling center.B．To clean a neighborhood park.C．To collect newspapers.D

A. To visit a recycling center.
B. To clean a neighborhood park.
C. To collect newspapers.
D. To plant trees.

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A．provedB．thoughtC．heldD．suspected

A. proved
B. thought
C. held
D. suspected

A．inB．forC．onD．force

A. in
B. for
C. on
D. force

60m跨度托架腹杆V2的轴心压力设计值N＝1855kN，拟采用热轧H型钢H390× 300×10×16，ix＝169mm，iy＝72.6mm，A=13670mm2。当按轴心受压构件进行稳定性计算时，杆件的最大压应力(N/mm2)与下列()项数值最为接近。

A. 162
B. 194
C. 253
D. 303

若已知裂缝间纵向受拉钢筋应变不均匀系数Ψ＝0.825，则该梁的短期效应刚度与下列()项数值最为接近。

A. 27610kN·m2
B. 27102kN·m2
C. 28610kN·m2
D. 29610kN·m2