●首页 加入收藏 网站地图 热点专题 网站搜索 [RSS订阅] [WAP访问]  
语言选择:
英语联盟 | www.enun.cn
英语学习 | 英语阅读 | 英语写作 | 英语听力 | 英语语法 | 综合口语 | 考试大全 | 英语四六 | 英语课堂 | 广播英语 | 行业英语 | 出国留学
品牌英语 | 实用英语 | 英文歌曲 | 影视英语 | 幽默笑话 | 英语游戏 | 儿童英语 | 英语翻译 | 英语讲演 | 求职简历 | 奥运英语 | 英文祝福
背景:#EDF0F5 #FAFBE6 #FFF2E2 #FDE6E0 #F3FFE1 #DAFAF3 #EAEAEF 默认  
阅读内容

[图文]2003年普通高等学校招生全国统一考试英语试卷(北京卷)阅读理解(3)

[日期:2007-05-07]   [字体: ]

C

Elephants don't forget—at least, female(雌性的)elephants don't. Elephant families are matriarchal. And the social knowledge gained by the oldest females is the key to a family group's survival(生存), according to a study published in April by Karen McComb, a biologist at Sussex University in England.

Elephants announce their presence by making a deep, long sound, a practice referred to as contact calling(联络呼叫). An unfamiliar call may mean that an elephant from outside the family group is nearby. A stranger can cause trouble, interrupting feeding or disturbing the young. So an elephant matriarch signals the family to gather around her; then they all lift their trunks in the air to smell the unfamiliar caller. False alarms can disturb the group and take time and energy away from feeding, so survival may depend in part on getting it right.

Working with Cynthia Moss, who founded the Amboseli Elephant Research Project in Kenya 30 years ago, McComb tested the social knowledge of 21 Amboseli elephant families with matriarchs 27 to 67 years old. She played recordings of contact calls to each family and found that the oldest matriarchs were much better at picking out unfamiliar calls. In fact, a group with a matriarch in her fifties was several thousand times more likely to form into a group upon hearing an unfamiliar contact call than when hearing a familiar call. However, families with younger matriarchs were less than twice as likely to gather together upon hearing an unfamiliar contact call as compared with a familiar call. And they gathered together a lot. Moreover, the social knowledge of older matriarchs translated into favourable results: Families with older matriarchs produced more baby elephants in each female-reproductive year.

This finding shows how difficult it is to protect the oldest members of elephant families. As elephants age, they continue to grow larger, as do their much wanted tusks(象牙). So the older—and wiser—a matriarch is, the GREater the chance she will be killed. About 800,000 elephants have been killed by people in the past 20 years.

61. What does the underlined word “matriarch” mean?

A. An old member of an elephant family.

B. A female head of an elephant family.

C. A wise elephant.

D. A large elephant.

62. When do elephants form into a group?

A. When they are feeding the young.

B. When they see a familiar elephant.

C. When they are giving birth to baby elephants.

D. When the leading elephant gives out a warning.

63. The research with recordings of contact calls shows _____.

A. how fast elephants form into groups

B. how important the age of a leading elephant is

C. how frightened elephants are when hearing a strange call

D. how frequently old elephants call other members of the family

64. The older a female elephant is, _____.

A. the stronger she will be

B. the poorer memory she will have

C. the more useless her tusks will be

D. the more likely she will be killed

65. We can infer from the passage that elephants may _____.

A. run into other elephant families

B. give wrong warnings to their mothers

C. run away upon hearing a strange sound

D. produce more babies by gathering together more often

参考答案:61. B 62. D 63. B 64. D 65. A

   免责声明:本站信息仅供参考,版权和著作权归原作者所有! 如果您(作者)发现侵犯您的权益,请与我们联系:QQ-50662607,本站将立即删除!
 
阅读:

推荐 】 【 打印
相关新闻       考试 
本文评论       全部评论
发表评论

点评: 字数
姓名:
内容查询

热门专题
 图片新闻