hce_kmu
106年
英文
第 33 題
📖 題組：
When humans first ventured out of Africa some 60,000 years ago, they left genetic footprints still visible today. By mapping the appearance and frequency of genetic markers in modern peoples, we create a picture of when and where ancient humans moved around the world. These great migrations eventually led the descendants of a small group of Africans to occupy even the farthest reaches of the Earth. Our species is an African one: Africa is where we first evolved, and where we have spent the majority of our time on Earth. The earliest fossils of recognizably modern Homo sapiens appear in the fossil record at Omo Kibish in Ethiopia, around 200,000 years ago. Once the climate started to improve, the population expanded, and some intrepid explorers ventured beyond Africa. These early beachcombers expanded rapidly along the coast to India, and reached Southeast Asia and Australia by 50,000 years ago. Around 20,000 years ago a small group of these Asian hunters entered the East Asian Arctic during the Last Glacial Maximum. At this time the great ice sheets covering the far north had literally sucked up much of the Earth's moisture in their vast expanses of white wasteland, dropping sea levels by more than 300 feet. This exposed a land bridge that connected the Old World to the New, joining Asia to the Americas. People's journey never ended. By 14,000 years ago they had penetrated the land south of the ice, and made it all the way to the tip of South America. Is this part of story amazing?
When humans first ventured out of Africa some 60,000 years ago, they left genetic footprints still visible today. By mapping the appearance and frequency of genetic markers in modern peoples, we create a picture of when and where ancient humans moved around the world. These great migrations eventually led the descendants of a small group of Africans to occupy even the farthest reaches of the Earth. Our species is an African one: Africa is where we first evolved, and where we have spent the majority of our time on Earth. The earliest fossils of recognizably modern Homo sapiens appear in the fossil record at Omo Kibish in Ethiopia, around 200,000 years ago. Once the climate started to improve, the population expanded, and some intrepid explorers ventured beyond Africa. These early beachcombers expanded rapidly along the coast to India, and reached Southeast Asia and Australia by 50,000 years ago. Around 20,000 years ago a small group of these Asian hunters entered the East Asian Arctic during the Last Glacial Maximum. At this time the great ice sheets covering the far north had literally sucked up much of the Earth's moisture in their vast expanses of white wasteland, dropping sea levels by more than 300 feet. This exposed a land bridge that connected the Old World to the New, joining Asia to the Americas. People's journey never ended. By 14,000 years ago they had penetrated the land south of the ice, and made it all the way to the tip of South America. Is this part of story amazing?
What is the purpose of this essay?
- A The author suggests we should take a trip to Africa.
- B The author's purpose is to theorize the importance of human over other animals.
- C The author argues about human rights.
- D The author proposes a map of human migration.
- E The author wants to discover America.
思路引導 VIP
請試著觀察文中提到的多個地理標籤（如：Africa, India, Australia, America）以及對應的年份（如：60,000, 50,000, 14,000 years ago），如果我們在地球儀上將這些地點與時間依序連成一條線，這條線所呈現的「過程」或「動態現象」，最適合用什麼樣的詞彙來統稱它？
🤖
AI 詳解
AI 專屬家教
太棒了！你能精準地從段落中繁雜的地理位置與時間線，梳理出作者的核心意圖，這代表你具備優秀的主旨歸納能力。
人類遷徙的時空圖譜
這篇文章的關鍵在於其敘事結構。作者開篇即提到透過遺傳標記（genetic markers）來描繪人類在何時、何地移動，隨後便以時間為經、地理為緯，詳述了人類從非洲衣索比亞出發，經由印度、東南亞、澳洲，最後跨越白令陸橋抵達美洲的歷程。選項 (D) 所提到的 「提出人類遷徙圖譜」（proposes a map of human migration） 正好完美涵蓋了這些跨越數萬年的空間演變，而不像其他選項僅偏向單一地區或無關的主題。
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