moea_joint
113年
英文
第 comp36 題
📖 題組：
The Great Migration is the largest herd movement of animals on the planet. The numbers are astonishing: over 1.5 million wildebeests, zebras, and antelopes move in a constant cycle through the Serengeti-Mara ecosystem in search of nutritious grass and water. Guided by survival instinct, each wildebeest will cover 800 to 1,000 km on its individual journey along age-old migration routes. Hungry predators, including lions, leopards, cheetahs, hyenas, wild dogs, and crocodiles, ensure the strongest survive in this natural spectacle. This is also known as ‘the greatest show on Earth.’ The animals travel from the Ngorongoro Conservation Area in southern Serengeti, Tanzania, through the Serengeti, into the Masai Mara in Kenya, and then back again. The journey is beset with danger: young calves are snatched by predators, the slow ones are brought down by prides of lion, brave beasts break legs on steep river slopes, crocodiles take their share of the stragglers, and the weak and exhausted drown. As for the three major animals of the migrant grazers, they have different grass-eating habits: as one group eats the top of the tallest grass, the next group will eat away some of the medium-height grass until finally it is almost completely eaten, and the herds move on. This means each group sticks to its kind with only a tiny overlap in their distributions. The grasses of the plains have the highest protein content throughout the Serengeti and are also high in calcium. It is unclear how the wildebeests know which way to go. However, it is generally believed that their journey is dictated primarily by their response to the weather. They probably follow the rains and new grass growth. Some experts believe the animals react to lightning and thunderstorms in the distance. It has even been suggested that wildebeest can locate rain more than 50 km away.
The Great Migration is the largest herd movement of animals on the planet. The numbers are astonishing: over 1.5 million wildebeests, zebras, and antelopes move in a constant cycle through the Serengeti-Mara ecosystem in search of nutritious grass and water. Guided by survival instinct, each wildebeest will cover 800 to 1,000 km on its individual journey along age-old migration routes. Hungry predators, including lions, leopards, cheetahs, hyenas, wild dogs, and crocodiles, ensure the strongest survive in this natural spectacle. This is also known as ‘the greatest show on Earth.’ The animals travel from the Ngorongoro Conservation Area in southern Serengeti, Tanzania, through the Serengeti, into the Masai Mara in Kenya, and then back again. The journey is beset with danger: young calves are snatched by predators, the slow ones are brought down by prides of lion, brave beasts break legs on steep river slopes, crocodiles take their share of the stragglers, and the weak and exhausted drown. As for the three major animals of the migrant grazers, they have different grass-eating habits: as one group eats the top of the tallest grass, the next group will eat away some of the medium-height grass until finally it is almost completely eaten, and the herds move on. This means each group sticks to its kind with only a tiny overlap in their distributions. The grasses of the plains have the highest protein content throughout the Serengeti and are also high in calcium. It is unclear how the wildebeests know which way to go. However, it is generally believed that their journey is dictated primarily by their response to the weather. They probably follow the rains and new grass growth. Some experts believe the animals react to lightning and thunderstorms in the distance. It has even been suggested that wildebeest can locate rain more than 50 km away.
What is the main purpose of this article?
- A It mainly introduces African wildlife that can move freely on the vast rolling plains of the Serengeti.
- B It mainly indicates the solutions to the problem of some roads crossing the path of the Great Migration.
- C It mainly describes the ever-moving circular migration of over a million animals across the Serengeti-Mara ecosystem.
- D It mainly shows that the Great Migration is slowly collapsing due to widespread habitat loss.
思路引導 VIP
如果你試著觀察每一段落的開頭，你會發現作者不斷提及動物的「移動數量」、「起點與終點」以及「移動的原因」。試著思考看看：作者是在針對一個特定的「社會問題」提出解決方案，還是在向讀者完整地介紹一個「自然界現象的運作過程」呢？
🤖
AI 詳解
AI 專屬家教
太棒了！你能精準選出選項 (C)，代表你對這篇長文的「宏觀架構」掌握得很紮實，沒有被片段的資訊干擾。這題的核心在於找出貫穿全文的靈魂，而你成功捕捉到了作者的寫作意圖。
掌握全文核心脈絡
這篇文章的結構非常嚴謹：第一段先定義這場遷徙的驚人規模（1.5 million animals），接著詳述地理路徑（from Tanzania to Kenya and back），並解釋背後的生存機制與環境驅動力（weather and grass growth）。選項 (C) 提到的 circular migration（循環遷徙）與 over a million animals，正是對文中所述「constant cycle」最精準的概括。相較於其他選項，(A) 過於籠統，而 (B) 與 (D) 則提到了文中完全未觸及的外部資訊。
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