铺道时，轨枕散布前为使其分布的位置正确，应在路基上以木桩或白灰标出各节钢轨行将铺设的位置，井下应在巷道接近铁道一侧的巷帮上标出。
参考答案：对
卫生桥的桥体形式是（）。
A.鞍式桥体
B.改良鞍式桥体
C.盖嵴式桥体
D.船底式桥体
E.悬空式桥体
—Could you tell me _____?
—Certainly. At 8 o’clock. [ ]
A. when will the train to Beijing leave
B. when the train to Beijing would leave
C. when the train to Beijing left
D. when the train to Beijing will leave
