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[背景材料]投资估算1300多亿元、设计时速350千米、初期运营时速300千米,运营后北京至上海只需5小时……2006年4月3日,铁道部宣布京沪高速铁路预计年内正式开工、2010年投入运营的消息,引起人们高度关注。1.某高速铁路选择在图1中地形区域通过,主要原因是( )A.该部位为山脊,地势较高B.该部位为山谷,工程量较小C.该部位为鞍部,地势较低D.该部位岩层软弱,易于开挖
[Background] The investment is estimated to be more than 130 billion yuan, the design speed of 350 kilometers per hour, the initial operating speed of 300 kilometers per hour, Beijing to Shanghai only 5 hours after the operation ... ... April 3, 2006, the Ministry of Railways announced the Beijing-Shanghai high-speed railway is expected The official start of the year, put into operation in 2010 news, aroused great concern. 1. The selection of a high-speed railway through the terrain in Figure 1 is mainly due to () A. The site is a ridge with a high terrain B. The site is a valley with a small amount of work C. The site is a saddle with a low topography D. This part of the rock is weak and easy to dig