“How could you treat me like that?” John asked his wife, eyeing her angrily from _______ the kitchen table.  

A．at

B．across

C．through

D．on

一个普通剪力螺栓在抗剪连接中的承载力是（）。

A.螺杆的抗剪承载力

B.被连接构件（板）的承压承载力

C.前两者中的较大值

D.A、B中的较小值