There were warnings against the 2004 tsunami but the warnings couldn’t reach the spot. Tsunami warning centers in Japan, Kamch

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问题 There were warnings against the 2004 tsunami but the warnings couldn’t reach the spot.  
Tsunami warning centers in Japan, Kamchatka, Alaska, Hawaii, French Polynesia, and Chile are set up in order to issue warnings about tsunamis that______.

选项

答案arc generated within 100 to 750 km of an earthquake

解析 空白处应为名词性成分,而且应该是一个美国的州名。原文该段第2旬末提到的the Center就是首句中提到的the Pacific Tsunami Warning Center,第2句末明确表明该中心位于夏威夷州,因此本题答案为Hawaii。  
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