下列情况属于正常使用极限验算的是（）
A．受压构件的稳定计算
B．梁的挠度验算
C．受弯构件的弯曲强度验算
D．螺栓连接的强度验算
参考答案：B
—When will the problem be settled?
—Be patient! The person _______ will see to it as soon as possible.
A．in need
B．in demand
C．in response
D．in charge
