通信管理类指标是指用以反映通信运行管理及()管理的情况,包括检修计划完成情况、机构和人员、科技等方面的统计指标。
A.专业
B.设备
C.网络
D.业务
参考答案:A
Once he has ______ nothing can change his mind. [ ]
A. made up his mind
B. decided his mind
C. determined his mind
D. made his mind
微波发信机的主要性能指标包括哪些?