按照目前我国的电力可靠性评价分类体系划分，输变电设施可靠性评价属于（），用户供电可靠性评价属于（）。
参考答案：元件可靠性评价；系统可靠性评价
It was only when I read this story for a second time ________to appreciate its beauty.
A．that did I begin
B．had I begun
C．then I began
D．that I began
大坌坑文化
