题型:阅读理解 题类:常考题 难易度:普通
人教版(新课程标准)高中英语必修2 Unit 4 Wildlife protection同步练习3
Elephants are able to know the difference between a man and a woman, and can tell an adult (成年人) from a child—all from the sound of a human voice. This is according to a study in which researchers played voice recordings to wild African elephants.
The animals showed more fear when they heard the voices of adult Masai men. Usually Masai people hunt elephants, and this suggests that animals have grown to listen for and avoid them.
Prof. Karen McComb and Dr Graeme Shannon from the University of Sussex led the study. They explained that in former research they had used similar experiments to show that elephants could tell—from the sound of a lion—whether the animal was a female (雌性) or a more dangerous male (雄性).
Prof. McComb wanted to find out if the animals used their very sharp sense of hearing to recognize danger from humans.
The scientists recorded Masai men, women and children saying, in their own language, “Look, look over there, a group of elephants are coming.” They also recorded Kamba men saying this phrase.
Masai people often come across elephants, which can result in violent (暴力的) hunting. Kamba people, however, mainly feed on agriculture, which does not generally bring them into violent touch with the animals.
When the team played recordings of these different voices through a hidden speaker, they found that elephant family groups showed more fear in response to the voice of a Masai man, than to a Kamba man's voice. And the adult male Masai voices caused far more violent response than the voices of women or boys.
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The Metropolitan Museum of Art | |||
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Admission $25.00 recommended for adults, $12.00 recommended for students, includes the Main Building and The Cloisters(回廊)on the same day; free for children under 12 with an adult. Free with Admission All special exhibitions, as well as films, lectures, guided tours, concerts, gallery talks, and family/children's programs are free with admission. Ask about today's activities at the Great Hall Information Desk. | ![]() | ||
![]() | The Cloisters Museum and Gardens The Cloisters museum and gardens is a branch of The Metropolitan Museum of Art devoted to the art and architecture of Europe in the Middle Ages. The extensive collection consists of masterworks in sculpture, colored glass, and precious objects from Europe dating from about the 9th to the 15th century. | ||
Hours: Open 7 days a week. March-October10:00-17:15 November-February 10:00-16:45 Closed Thanksgiving Day, December 25, and January 1. | ![]() |
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