單項選擇題無線車次號系統(tǒng)中無線數(shù)據(jù)傳輸?shù)奶卣黝l率為()。

A.1:1200,0:1800
B.1:1500,0:1800
C.1:1800,0:1200
D.1:1200,0:1500


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