單項(xiàng)選擇題某無(wú)縫線路緩沖區(qū)采用25m標(biāo)準(zhǔn)軌,長(zhǎng)軌的伸縮區(qū)計(jì)算長(zhǎng)度為55m,則應(yīng)取值為()

A.25m
B.50m
C.62.5m
D.75m
E.100m


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