Eruptions can shoot 3, 700 to 8, 400 US gallons of boiling water to a height of 106 to 185 feet (32 to 56 m) lasting from 1.5 to 5 minutes. The average height of an eruption is 145 feet(44 m). The highest recorded eruption was 185 feet(56 m) high. Intervals(间隔) between eruptions can range from 45 to 125 minutes, averaging 66.5 minutes in 1939, slowly increasing to an average of 92 minutes today.
文章大意:本文是说明文。文章介绍的是美国黄石国家公园的老忠实间歇喷泉。
1.When people on the WashburnLangfordDoane Expedition saw Old Faithful, they ________.
A.were frightened B.decided to end their travel
C.were excitedD.took some photos in front of it
答案:C 推理判断题。由Nathaniel P.Langford在书中的描述可知,他们感到惊奇,发出惊呼,并且使用了wonderful, perfect这样的词语,由此可知他们心情兴奋。
2.In the 19th century, some visitors ________.
A.discovered more geysers in Yellowstone National Park
B.put their clothes in Old Faithful
C.hated to stay at Old Faithful Inn
D.bathed in Old Faithful
答案:B 细节理解题。由倒数第二段可知,在老忠实间歇喷泉被发现的早期,人们通常把它作为一个洗衣场所。
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