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МатематикаВопрос:
C. Male elephants of the African Savanna elephants can weigh six tones only when ... 1) they are very old. 2) they have lived half of their life. 3) they are younger than thirty years old.
Ответ:
Краткое пояснение:
Краткое пояснение: Текст указывает, что самцы африканских слонов достигают полного размера и максимального веса в возрасте 35-40 лет, что составляет более половины их продолжительности жизни.
Пошаговое решение:
- Шаг 1: Находим в тексте информацию о весе и возрасте африканских слонов-самцов.
- Шаг 2: Читаем предложение: «The African Savanna (Bush) elephant is the world's largest land animal – with adult males, or bull elephants, standing up to 3m high and weighing up to 6,000 kg.»
- Шаг 3: Находим предложение, описывающее достижение полного размера: «Males only reach their full size at the age of 35-40 - that's well over half of their lifespan as wild elephants can live for up to 60-70 years.»
- Шаг 4: Анализируем варианты ответа.
- Шаг 5: Сопоставляем информацию. Достижение веса в 6 тонн (6000 кг) происходит в возрасте 35-40 лет, что соответствует варианту «they have lived half of their life» (прожили половину своей жизни), так как общая продолжительность жизни составляет 60-70 лет.
Ответ: 2) they have lived half of their life.
Похожие
- Elephants are the biggest land animals today. They communicate with each other using very low sounds. Most of these sounds are too low for humans to hear. But elephants can hear them from far away. There are three species of elephants: African Savanna (Bush), African Forest and Asian. The ears of African elephants are much larger than their cousins, whereas the ears of Asian elephants are shaped like the Indian subcontinent. There's also a trunk difference - African elephants have two 'fingers' at the tip of their trunks, whereas Asian elephants have one. The African Savanna (Bush) elephant is the world's largest land animal – with adult males, or bull elephants, standing up to 3m high and weighing up to 6,000 kg. Males only reach their full size at the age of 35-40 - that's well over half of their lifespan as wild elephants can live for up to 60-70 years. Elephant tusks are actually their teeth which first appear when elephants are around 2 years old. Tusks continue growing throughout their lives. Tusks are used to help with feeding or as a defense when fighting. Tusks are essential for elephants and are used for a variety of tasks, including digging for water and salt, lifting objects, and for defense and competition for males. But these beautiful tusks often cause elephants danger. They're made from ivory; a much desired object. An elephant's skin is 2.5 cm thick in most places. The folds and wrinkles in their skin can retain up to 10 times more water than flat skin does, which helps to cool them down. They keep their skin clean and protect themselves from sunburn by taking regular dust and mud baths.
- A. People can't hear elephants' sounds because ... 1) their sounds are not high enough. 2) elephants communicate silently. 3) humans can understand only very low sounds.
- B. Asian elephants have ... African elephants. 1) bigger trunks than 2) smaller ears than 3) the same number of fingers at the tips of their trunks as
- D. Elephant tusks ... 1) grow all the time during their lives. 2) stop growing when elephants are two years old. 3) help elephants only to defend themselves.
- E. An elephant's skin ...
