9.B【解析】京哈高铁承德至北京段的京津冀地区过量开采地下水,加上构造运动、地面荷载等影响,产生区域性沉降,影响路基结构的稳定;沿途人口稠密,搬迁工程量大不属于自然障碍;华北地区河流汛期较短,易出现寒潮、暴雨、洪涝等气象灾害,但不易受到台风影响。10.B【解析】京哈高铁属于客运,铁路沿线设置多个站点主要是考虑人流量的密度,目的是便于沿线居民出行。东北地区人口并不稠密。11.C【解析】高速铁路具有速度优势,能够显著吸引和壮大旅游、商贸、房地产、文化教育等与人流聚集和速度有直接关系的现代服务业的发展。高铁的开通,能够显著提高沿线地区的空间可达性,改善区域投资环境,集聚优质生产要素,培育形成一些原本不具发展基础或发展优势的高端服务业。

短文改错Fires swept across the Amazon this month have been grabbing global headlines. Scientistsand environmentally groups are worried about that they will result in climate change and threatenenvironmentabiodiversity. As a largest rainforest in the world, the Amazon is often called "the lung of theworld". It is also home A 3 million species of plants and animals and million of local people.millionsQuantities of rainforests play an important role in the worlds ecosystem becauseabsowill be reflected back into the atmosphere. They also store carbon dioxide andwhich/thatproducing oxygen, insuring that fewer carbon is released, reducing the effects of climate changeproduce

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