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  3. Nowadays, scientists still have not made huge progress on the research of earthquake because they have not fully understood what

Nowadays, scientists still have not made huge progress on the research of earthquake because they have not fully understood what

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问题 Nowadays, scientists still have not made huge progress on the research of earthquake because they have not fully understood what cause earthquakes.
Nuclear power can be utilized as an electrical power, but it may become a source of earthquakes.
选项 A、Y
B、N
C、NG
答案A
解析 由题干中的a source of earthquakes定位到第一个小标题下首段末句，All kinds of things can cause earthquakes，同时由nuclear power定位到该句列举的an underground nuclear test。题于中的a source of earthquakes与文中things can cause earthquakes属同义转述，由该段末句中列举的导致地震的原因中可以发现underground nuclear test是其中之一，故题干所述是正确的。
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