2019年12月18日，连接青海格尔木与甘肃敦煌的敦格铁路全面建成通车。读敦格铁路示意图和敦煌莫高窟景观图，完成题目。
敦煌莫高窟壁画能保存至今，原因可能是（ ）
- A.沿海地区，距海较近
- B.地形复杂，地势起伏大
- C.气候干燥，不易受潮
- D.河流众多，水源充足
正确答案及解析
正确答案
C
解析
敦煌莫高窟壁画至今仍然保存完好，主要得益于该地区属于温带大陆气候，全年降水稀少，不易受潮，与其余三项叙述无关，故选C。
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