题目内容
19.Their beautiful call suggests the arrival of spring,but the routes taken by cuckoos(杜鹃) during their annual migration(迁徙) have remained a mystery.Now,though,scientists from the British Trust for Omithology(BTO) have revealed the details of their remarkable 10,000-mile journey,with the help of tracking devices.Five male birds were caught in Norfolk last May and fitted with satellite-tagged"backpacks''before being released.The scientists then monitored their progress over 12months as they flew to Africa in the autumn,and returned in the spring.
The project was carried out to discover why every year fewer of the birds return to Britain.Between 1995and 2010,the population of cuckoos spending summer here fell by almost half,and the number is continuing to decline.Previously,the lack of information about the cuckoos'long migration has hampered the understanding of how to help conserve the birds.
Earlier this year,it was reported that cuckoos arrived in the UK much earlier than normal.Their call was recorded by ornithologists(鸟类专家) as early as February,a month ahead of their usual arrival.
Like all migrating animals,cuckoos respond to the changing seasons.They depend on lush plants to provide the fruit and food for insects that they feed on.This reliance on seasonal patterns means that a changing climate could make an already challenging journey impossible for them.
32.What is the main purpose of the project?D
A.To track cuckoos'10,000-mile journey.
B.To better understand the habits of cuckoos.
C.To find out what happens during cuckoos'journey.
D.To discover why the population of cuckoos is declining.
33.The underlined word"hampered"in Paragraph 3 probably meansA.
A.prevented B.deepened C.improved D.affected
34.When do cuckoos usually arrive in Britain?C
A.In January.B.In February.C.In March.D.In April.
35.Cuckoos arrived in the UK much earlier than normal probably because ofB.
A.1acking food
B.changing climate
C.changing routes
D.cold spring in the UK.
分析 文章主要讲述了由于季节的变化以及食物等因素的影响下杜鹃数量下降的原因.
解答 32.D 主旨题.文章主要讲述了杜鹃数量下降的主要原因,根据文章内容"Like all migrating animals,cuckoos respond to the changing seasons.They depend on lush plants to provide the fruit and food for insects that they feed on."可知,杜鹃数量下降由于季节的变化以及食物等因素的影响.故选D
33.A词意猜测题.根据文章内容"the lack of information about the cuckoos long migration has hampered the understanding of how to help conserve the birds."关于杜鹃迁移信息的缺乏阻碍了了解如何保护鸟类.该词在文章中的含义可以理解为阻碍.故选A.
34.C 根据文章内容"Their call was recorded by ornithologists(鸟类专家) as early as February,a month ahead of their usual arrival."可知,平常鸟类飞到英国是三月,而今年在二月份就飞到了英国.故选C.
35.B 根据文章内容"This reliance on seasonal patterns means that a changing climate could make an already challenging journey impossible for them."可知鸟类的迁移主要是通过依赖气候的变化,故本题的答案为B.
点评 题目涉及多道细节理解题,做题时结合原文和题目有针对性的找出相关语句进行仔细分析,结合选项选出正确答案.推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案,切忌胡乱猜测,一定要做到有理有据.
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