重大质量事故由( )负责组织专家组进行调查。
A．监理单位 B．项目法人C．质监总站 D．项目主管部门
参考答案：C
It was for this reason _____ her uncle moved out of New York and settled down in a small village. [ ]
A. which
B. why
C. that
D. how
用打磨的方法处理汽缸裂纹时，应注意些什么？
