A、紅色指示燈常亮 B、紅綠指示燈均亮 C、綠色指示燈常亮 D、紅色指示燈均亮
A.17 B.6 C.23 D.1
A.數(shù)據(jù)段->數(shù)據(jù)包->數(shù)據(jù)幀->數(shù)據(jù)流->數(shù)據(jù) B.數(shù)據(jù)流->數(shù)據(jù)段->數(shù)據(jù)包->數(shù)據(jù)幀->數(shù)據(jù) C.數(shù)據(jù)->數(shù)據(jù)包->數(shù)據(jù)段->數(shù)據(jù)幀->數(shù)據(jù)流 D.數(shù)據(jù)->數(shù)據(jù)段->數(shù)據(jù)包->數(shù)據(jù)幀->數(shù)據(jù)流