Black-box and white-box testing method ale often used in software testing phase, in which, the white-box is mainly used to test software's (73) .

A．external function of a program

B．reasonableness of structure

C．internal logic of a program

D．correctness of a program

包线员和/或巡视员一旦发现外力可能影响通信线路，在现场做好监护和保护工作的同时，要及时填写（）上报区域对外配合主管。

A.技术保护方案审批表

B.保护通信线路安全协议

C.外力影响信息报告表

D.通信线路外力影响防护统计表