各级电网调度机构要加强(),优化电网运行管理,同时制定有效的反事故预案,确保电网安全稳定运行。
A.即时监控
B.运行管理
C.考核管理
D.统计分析
参考答案:A
I can't go home now. A lot of work ______ to be done. [ ]
A. have
B. is remained
C. left
D. remains
There isn’t a teacher in the classroom and all the students are talking. So the classroom is ________.
A.quiet B. strict C. noisy