阅读《詹天佑》中的一段话，按要求完成后面的练习。
铁路要经过很多高山，不得不开凿隧道，其中数居庸关和八达岭两个隧道的工程最艰巨。居庸关山势高，岩层厚，詹天佑决定采用从两端同时向中间凿进的办法。山顶的泉水往下渗，隧道里满是泥浆。工地上没有抽水机，詹天佑就带头挑着水桶去排水。他常常跟工人们同吃同住，不离开工地。八达岭隧道长一千一百多米，有居庸关隧道的三倍长。他跟老工人一起商量，决定采用中部凿井法。先从山顶打一口竖井，再分别向两头开凿，两头也同时施工，把工期缩短了一半。
(1)写出下列词语的近义词。
采用——（ ）缩短——（ ）商量——（ ）艰巨——（ ）
(2)填空。
居庸关的特点是__________，詹天佑采用__________的办法；八达岭的特点是__________，詹天佑采用__________。詹天佑能根据不同的山势采用不同的办法，可以看出他__________。
正确答案及解析
正确答案
解析
(1)运用、使用 缩减商议 艰难 (2)山势高，岩层厚从两端同时向中间凿进 隧道长 中部凿井法 具有杰出的智慧和才干
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