A.監(jiān)視電力系統(tǒng)B.監(jiān)視控制系統(tǒng)C.規(guī)約轉(zhuǎn)換D.維護系統(tǒng)
A.數(shù)據(jù)幀B.數(shù)據(jù)流C.數(shù)據(jù)包D.數(shù)據(jù)鏈
A.15天B.30天C.60天D.180天