大跨径石拱桥拱圈采用分环分段砌筑的目的之一是减小拱架的施工荷载。( )
参考答案：对
He often stands against the fence and talks endlessly with my father _____ gardening problems.
A．to
B．too
C．about
D．off
医疗机构执业，必须遵守有关法律、（）和（）的规定。
