施工过程中，协调业主与施工单位、施工单位和设计单位洽商行为的记录称为（）。
A．工程洽谈
B．施工洽谈
C．工程洽商
D．施工洽商
参考答案：C
I was out of town at thetime, so I don't know exactly how it ____. [ ]
A. was happening
B. happened
C. happens
D. has happened
站场连接加注缓蚀剂的型号为（）。
A.CI1204
B.CI545
C.L545
D.L1204
