对项目质量进行验收，是（）质量管理的主要内容
A.项目概念阶段
B.项目开发阶段
C.项目实施阶段
D.项目收尾阶段
参考答案：D
I'll never understand how it _____ that he still insisted on going there alone after being told about the
possible danger. [ ]
A. came about
B. came across
C. came out
D. came up
绝缘子的底座、套管法兰、保护网（罩）及母线支架等可接近裸露导体接地要求是什么？
