第1题: [单项选择]The New Madrid fault is______. A. a horizontal fault B. a vertical fault C. a more serious fault than the San Andreas fault D. responsible for forming the Mississippi River 参考答案:B 答案解析:[试题分析] 细节了解题。
[详细解答] 本题答案可以直接从第五段第一句话The New Madrid fault,on the other hand,is a vertical fault看出。因