要认真进行锅炉监造、安全性能检验和（ ）的检验工作。
参考答案：竣工验收
In my opinion, life in the twenty-first century is much easier than ____.
A．what used to be
B．that it used to be
C．it used to be
D．what it used to be
什么是迁移根据迁移的性质可以分成哪几种
