外周边框架底层某中柱，截面b×h=700mm×700mm，混凝土强度等级为C50 (fc＝23.1N/mm2)，内置Q345型钢(fa＝295N/mm2)，考虑地震作用组合的柱轴向压力设计值N＝18000kN，剪跨比λ＝2.5。试问，采用的型钢截面面积的最小值(mm2)应最接近于下列()项数值。
A. 14700
B. 19600
C. 45000
D. 53000
查看答案
What does the last sentence in the 3rd paragraph mean according to the passage？
A. The patient is seriously iii because of lack of water in the well.
B. The patient can be saved if he has enough money to solve the financial problem.
C. It's too late for small business owners to realize the gravity of the problem because they have used up their money.
D. It's urgent for small business owners to pour all their money into the enterprise to revitalize their business.
A．Preparing for the race of Marathons.B．Preparing for the cycling race the next day.C．T
A. Preparing for the race of Marathons.
B. Preparing for the cycling race the next day.
C. Training for a hiking race.
Doing an experiment.
设构件承受剪力设计值V＝80kN，箍筋间距s=100mm，受扭纵筋与箍筋的配筋强度比值为ξ=1.2，腹板的塑性抵抗矩Wtw和所受扭矩w的比值为0.98，已知构件须按剪扭构件计算，则腹板的抗剪箍筋的计算面积Asv最接近()项数值。
A. 50mm2
B. 29mm2
C. 25mm2
D. 18mm2
A．Because she is too weak to say much.B．Because she is not familiar with the area.C．Be
A. Because she is too weak to say much.
Because she is not familiar with the area.
C. Because she has lived here for a 'long time.
D. Because she has never taken the bus before.
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