（）电梯使用单位的日常安全管理人员应对施工单位的电梯日常维护保养情况进行监督，并对维保记录签字确认。
参考答案：对
— Fancy meeting you here!
— Pleased to see you. If they ____ me to the party, I ____ here. [ ]
A. hadn't invited; wouldn't be
B. didn't invite; wouldn't be
C. hadn't invited; wouldn't have been
D. didn't invite; won't be
U75钢是什么钢？
