[請益] TPO15 MASS EXTINCTIONS
看板TOEFL_iBT (TOEFL_iBT托福)作者Choriscol (粹雷戈)時間14年前 (2011/09/13 02:08)推噓1(1推 0噓 0→)留言1則, 1人參與討論串1/2 (看更多)
Paragraph 7: An asteroid of this size would be expected to leave an immense
crater, even if the asteroid itself was disintegrated by the impact. The
intense heat of the impact would produce heat-shocked quartz in many types of
rock. Also, large blocks thrown aside by the impact would form secondary
craters surrounding the main crater. To date, several such secondary craters
have been found along Mexico's Yucatan Peninsula, and heat-shocked quartz has
been found both in Mexico and in Haiti. A location called Chicxulub, along
the Yucatan coast, has been suggested as the primary impact site.
12. What is the purpose of paragraph 7 in the passage?
○It proposes a decisive new test of the Alvarez hypothesis.
○It presents additional supporting evidence for the Alvarez hypothesis.
○It explains why evidence relating to the Alvarez hypothesis is hard to find.
○It shows how recent evidence has raised doubts about the Alvarez hypothesis
黃金閱讀的答案是C，但TPO內給的答案是B，我自己是選B
有請強者指教正確答案，謝謝 Orz
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