5. Sperm whales（巨头鲸） can produce（产生）stronger（更强的） ultrasonic waves （超声波）to kill（杀死） their prey（猎物） than dolphins（企鹅）.
A. Right B. Wrong C. Not mentioned来源：www.examda.com
5．C． 细节题。利用问题句中细节信息词Sperm whales, ultrasonic waves和prey作为答案线索， 在文章中查找答案相关句：
Irish scientists monitoring dolphins living in a river estuary in the southwest of the country believe they may have developed a unique dialect to communicate with each other.
The Shannon Dolphin and Wildlife Foundation (SDWF)1 has been studying a group of up to 120 bottle-nose dolphins in the River Shannon2 using vocalisations collected on a computer in a cow shed3 near the River Shannon.
As part of a research project, student Ronan Hickey digitised and analysed a total of 1,882 whistles from the Irish dolphins and those4 from the Welsh dolphins on a computer and separated them into six fundamental whistle types and 32 different categories5. Of the categories, he found most6 were used by both sets of dolphins7 -- but eight were only heard from the Irish dolphins.
"We are building up a catalogue of the different whistle types they use and trying to associate them with behaviour like foraging, resting, socialising and the communications of groups with calves," project leader Simon Berrow said. "Essentially we are building up what is like a dictionary of words they use or sounds they make."
Berrow, a marine（海洋的， 航海的） biologist（生物学）, said the dolphins' clicks（发出的卡塔声） are used to（被用于） find（发现） their way around（周围） and locate（查找...的地点，位于） prey. The whistles are communications（交流）. "They do a whole range of other sounds like barks, groans and a kind of gunshot," he said. "The gunshot （枪响声）is an intense（强烈的） pulse of sound（脉冲声）. Sperm whales use it to stun their prey.
"When I first heard it I was surprised as I thought sperm whales were the only species who used it. We can speculate the dolphins are using it for the same reason as the sperm whales," Berrow said.
References8 in local legend indicate there have been dolphins in the Shannon estuary for generations and they may even have been resident there as far back as the 6th century9.
They are regularly seen by passengers on the Shannon ferry and an estimated 25,000 tourists every year take special sightseeing tours on local boats to visit them.
本题所说的意思是鲸鱼能发出比海豚更强烈的超声波去杀死猎物。题句表达的内容短文中找不到，故答案为 C。
6. As early as （早在）the 6th century（世纪）, Irish（爱尔兰的） fishermen（渔夫） started（开始） raising（提高, 饲养, 筹集 ） dolphins in the Shannon estuary（河口）.
A. Right B. Wrong C. Not mentioned
6．B． 细节题。 利用问题句中细节信息结构as early as the 6th century和特征结构Irish fishermen及Shannon estuary共同作为答案线索， 在文章中查找答案相关句：
Irish scientists monitoring dolphins living in a river estuary in the southwest of the country believe they may have developed a unique dialect to communicate with each other.
The Shannon Dolphin and Wildlife Foundation (SDWF)1 has been studying a group of up to 120 bottle-nose dolphins in the River Shannon2 using vocalisations collected on a computer in a cow shed3 near the River Shannon.
As part of a research project, student Ronan Hickey digitised and analysed a total of 1,882 whistles from the Irish dolphins and those4 from the Welsh dolphins on a computer and separated them into six fundamental whistle types and 32 different categories5. Of the categories, he found most6 were used by both sets of dolphins7 -- but eight were only heard from the Irish dolphins.
"We are building up a catalogue of the different whistle types they use and trying to associate them with behaviour like foraging, resting, socialising and the communications of groups with calves," project leader Simon Berrow said. "Essentially we are building up what is like a dictionary of words they use or sounds they make."
Berrow, a marine biologist, said the dolphins' clicks are used to find their way around and locate prey. The whistles are communications. "They do a whole range of other sounds like barks, groans and a kind of gunshot," he said. "The gunshot is an intense pulse of sound. Sperm whales use it to stun their prey.
"When I first heard it I was surprised as I thought sperm whales were the only species who used it. We can speculate the dolphins are using it for the same reason as the sperm whales," Berrow said.
References(证明， 参考) in local（当地的，局部的） legend（传说） indicate（显示） there have been dolphins （一直有）in the Shannon estuary for generations （存在了数代）and they may even have been resident（居民， 居住的） there as far back as /远在/早在the 6th century(最远追溯到6世纪).
They are regularly seen by passengers on the Shannon ferry and an estimated 25,000 tourists every year take special sightseeing tours on local boats to visit them.
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