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  3. Nowadays, scientists still have not made huge progress on the research of earthq

Nowadays, scientists still have not made huge progress on the research of earthq

游客2024-06-17  39
问题 Nowadays, scientists still have not made huge progress on the research of earthquake because they have not fully understood what cause earthquakes. [br] When an earthquake with level 7 in Richter scale rating is reported it means that its amplitude is ______ times stronger than a level 6 earthquake.
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答案 10
解析 由题干中的amplitude和level定位到第五个小标题下第2段末句That is，the wave amplitude in a level 6 earthquake...a level 9 earthquake．此处需填入数词性成分，基于Richter scale的数字是按10倍增长的，文中所述6级地震波振幅比5级地震增加10倍，同样从7级地震到9级地震其幅度增加100倍，因此很容易得出本题结论。
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