A Earthquake’s Forecast B Historical Records of Earthquakes C Intensities of Earthquakes D Cause of Earthquakes E Indicatio

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问题 A  Earthquake’s Forecast
B  Historical Records of Earthquakes
C  Intensities of Earthquakes
D  Cause of Earthquakes
E  Indications of Earthquakes
F  Damaging Earthquakes
*

选项

答案E

解析 动词observing后面应该有一个宾语,故应选一个名词短语。人类的行为变化跟地震并没有关系,因此F不是正确的选项。
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