首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Operation Migration If you look up at the sky in the early fall in the nort...
Operation Migration If you look up at the sky in the early fall in the nort...
admin
2020-12-24
13
问题
Operation Migration
If you look up at the sky in the early fall in the northern part of North America, you may see groups of birds. These birds are flying south to places where they can find food and warmth for the winter. They are migrating (迁徙).The young birds usually learn to migrate from their parents. They follow their parents south. In one unusual case, however, the young birds are following something very different. These birds are young whooping cranes, and they are following an airplane!
The whooping crane is the largest bird that is native to North America. These birds almost disappeared in the 1800s. By 1941,there were only about 20 cranes alive. In the 1970s, people were worried that these creatures were in danger of disappearing completely. As a result, the United States identified whooping cranes as an endangered species that they needed to protect.
Some researchers tried to help. They began to breed whooping cranes in special parks to increase the number of birds. This plan was successful. There were a lot of new baby birds. As the birds became older, the researchers wanted to return them to nature. However, there was a problem: These young birds did not know how to migrate. They needed human help.
In 2001,some people had a creative idea. They formed an organization called Operation Migration. This group decided to use very light airplanes, instead of birds, to lead the young whooping cranes on their first trip south. They painted each airplane to look like a whooping crane. Even the pilots wore special clothing to make them look like cranes. The cranes began to trust the airplanes, and the plan worked.
Today, planes still lead birds across approximately 1,200 miles (1,931 kilometers), from the United States-Canadian border to the Gulf of Mexico. They leave the birds at different sites. If a trip is successful, the birds can travel on their own in the future. Then, when these birds become parents, they will teach their young to migrate. The people of Operation Migration think this is the only way to maintain the whooping crane population.
Operation Migration works with several other organizations and government institutes. Together, they assist hundreds of cranes each year. However, some experts predict that soon, this won’t be necessary. Thanks to Operation Migration and its partners, the crane papulation will continue to migrate. Hopefully, they won’t need human help any more.
Whooping cranes are native to{pz_填空}.
选项
A Mexico
B South America
C the Persian Gulf
D North America
答案
D
解析
第二段第一句 “The whooping crane is the largest bird that is native to North America ”, 因此选D。
转载请注明原文地址:https://ti.zuoweng.com/ti/fGpQKKKQ
相关试题推荐
OperationMigration Ifyoulookupattheskyintheearlyfallinthenort...
OperationMigration Ifyoulookupattheskyintheearlyfallinthenort...
OperationMigration Ifyoulookupattheskyintheearlyfallinthenort...
OperationMigration Ifyoulookupattheskyintheearlyfallinthenort...
OperationMigration Ifyoulookupattheskyintheearlyfallinthenort...
ImmigrationandProblems Hundredsofthousandsofpeoplesupportingimmigrat...
共用题干 第三篇OperationMigrationIfyoulookupattheskyintheearlyfallinth...
共用题干 第三篇OperationMigrationIfyoulookupattheskyintheearlyfallinth...
共用题干 第三篇OperationMigrationIfyoulookupattheskyintheearlyfallinth...
共用题干 第三篇OperationMigrationIfyoulookupattheskyintheearlyfallinth...
随机试题
关于军团菌的叙述,正确的是 A.嗜肺军团菌有12个血清型 B.嗜肺军团菌有1
接触麻疹后多长时间行被动免疫可预防麻疹 A、5天内 B、7天内 C、1
监理工程师对技术设计图纸的审核应侧重于()
2018年3月,某企业集团派出审计组对下属丙公司2017年度财务收支情况进行了审
新生入校,独立是第一关,独立应该从哪些小事做起?
货币经纪公司是()等交易的集合点,发挥交易媒介的作用。A.外汇B.现金C.债权D.贷款E.资金
乳剂的质量要求包括A.普通乳、亚微乳外观乳白色B.纳米乳透明,无分层现象C.无异臭味,内服口感适宜,外用与注射用无刺激性D.有良好的流动性E.具有一定的
房地产经纪机构内,负责为客户代办房地产产权过户手续的部门一般是( )。A、业务部门B、基础部门C、客户服务部门D、业务支持部门
A期货公司准备从事投资咨询业务,在准备提交的申请材料中,准备了期货投资咨询业务资格申请书,股东会关于申请期货投资咨询业务的决议文件等一系列材料。 A期货...
中国香港恒生指数是由香港恒生银行于()年开始编制的用以反映香港股市行情的一种股票指数。A:1966B:1967C:1968D:1969