一道托福阅读题求解释,Paragraph 7:【Earth is a target in a cosmic shooting gallery,subject to random violent events that were unsuspected a few decades ago.】 In 1991 the United States Congress asked NASA to investigate the hazard posed to
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![一道托福阅读题求解释,Paragraph 7:【Earth is a target in a cosmic shooting gallery,subject to random violent events that were unsuspected a few decades ago.】 In 1991 the United States Congress asked NASA to investigate the hazard posed to](/uploads/image/z/5976094-22-4.jpg?t=%E4%B8%80%E9%81%93%E6%89%98%E7%A6%8F%E9%98%85%E8%AF%BB%E9%A2%98%E6%B1%82%E8%A7%A3%E9%87%8A%2CParagraph+7%3A%E3%80%90Earth+is+a+target+in+a+cosmic+shooting+gallery%2Csubject+to+random+violent+events+that+were+unsuspected+a+few+decades+ago.%E3%80%91+In+1991+the+United+States+Congress+asked+NASA+to+investigate+the+hazard+posed+to)
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