單項選擇題列車正點率等于()。

A、(全部開行列數(shù)-晚點列數(shù))∕全部開行列數(shù)*100%
B、(全部開行列數(shù)∕晚點列數(shù))*全部開行列數(shù)∕100%
C、(晚點列數(shù)-全部開行列數(shù))∕全部開行列數(shù)*100%
D、(全部開行列數(shù)*晚點列數(shù))-晚點列數(shù)*100%


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