托福听力tpo15 In stating that "no asteroid itself has ever been recovered", the author emphasizes which of the following? 答案解析【小站备考】

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10.In stating that "no asteroid itself has ever been recovered", the author emphasizes which of the following?

The importance of the indirect evidence for a large asteroid

The fact that no evidence supports the asteroid impact hypothesis

The reason many researchers reject the Alvarez hypothesis

The responsibility of scientists for not making the effort to discover the asteroid itself

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正确答案：A

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修辞目的题，看本句先，原句说Ir异常支持了撞击说，但还没发现具体的星体。所以B说没有evidence错，说反了；C有人reject他的观点，还有D的scientists的责任原文都说，不选；正确答案是A，只有Ir异常这个间接证据就可以支持撞击说，所以是indirect evidence

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托福听力official15 In stating that "no asteroid itself has ever been recovered", the author emphasizes which of the following? 答案解析