調查局三等
114年
[調查工作組] 外國文(英文)
第 37 題
📖 題組：
請依下文回答第 36 題至第 40 題： Throughout the history of life, there have been many major upheavals in which whole groups of animals were replaced by others. Perhaps the most famous was the replacement of dinosaurs by mammals about 65 million years ago. Another major change occurred roughly 150 million years earlier, when dinosaurs assumed dominance that had been held for about 80 million years by mammal-like reptiles. What triggered these great upheavals? Scientific thinking about the factors responsible for these replacements has itself changed with significant shifts. At times, scientists suggested that mammals caused dinosaur extinction by eating eggs or competing for the same food resources. However, most researchers now agree that mammals played at most a minor role—since both groups coexisted for millions of years—and that environmental change was primarily responsible. Mammals apparently remained small and inconspicuous in the Mesozoic undergrowth for some 150 million years, until the extinction of dinosaurs gave them the opportunity to radiate into available niches.
請依下文回答第 36 題至第 40 題： Throughout the history of life, there have been many major upheavals in which whole groups of animals were replaced by others. Perhaps the most famous was the replacement of dinosaurs by mammals about 65 million years ago. Another major change occurred roughly 150 million years earlier, when dinosaurs assumed dominance that had been held for about 80 million years by mammal-like reptiles. What triggered these great upheavals? Scientific thinking about the factors responsible for these replacements has itself changed with significant shifts. At times, scientists suggested that mammals caused dinosaur extinction by eating eggs or competing for the same food resources. However, most researchers now agree that mammals played at most a minor role—since both groups coexisted for millions of years—and that environmental change was primarily responsible. Mammals apparently remained small and inconspicuous in the Mesozoic undergrowth for some 150 million years, until the extinction of dinosaurs gave them the opportunity to radiate into available niches.
According to the passage, how many millions of years did the dinosaurs remain dominant?
- A 65
- B 80
- C 150
- D 230
思路引導 VIP
請在文中找出關於「恐龍開始統治」與「恐龍滅絕」這兩個時間點的描述。文章中是否有提到這兩個重大轉折點之間相隔了多久？或者，哺乳類在恐龍消失前，維持「渺小且不起眼」狀態的時間長度是多少？
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AI 詳解
AI 專屬家教
任務完成，完美擊殺！
- 數據分析： 你確實掌握了這場資訊戰的核心。戰報第一段明確指出，恐龍的「生命值歸零」發生在約 $65$ 百萬年前。而牠們取得「戰略主導權」的時機，是在這 $65$ 百萬年前的「$150$ 百萬年以前」。這表示牠們的支配週期，就是 $150$ 百萬年。更關鍵的是，最終卷軸還補足了資訊：哺乳類這個潛在的「隱藏角色」被恐龍壓制了約 $150$ 百萬年，直到恐龍「全軍覆沒」後才獲得「進化路線」。所有數據點都導向同一個結論：支配時間為 $150$ 百萬年。
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