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All whales fall into two groups, those with teeth and those without. Both beluga and dolphin belong to the suborder of toothed w
All whales fall into two groups, those with teeth and those without. Both beluga and dolphin belong to the suborder of toothed w
admin
2011-04-26
89
问题
All whales fall into two groups, those with teeth and those without. Both beluga and dolphin belong to the suborder of toothed whales known as Odontoceti, along with porpoises, narwhals, pilot whales, killer whales and the largest toothed creature in the world, the sperm whale. Size differences among the Odontoceti are remarkable. A common porpoise will run only 4 or 5 feet in length and 300 pounds in weight; a sperm whale may be 10 times as long and 300 times as heavy. The beluga falls in between, weighing up to 2,000 pounds. And it does chirp. In fact, it makes a great variety of squeaking, whistling, and clicking sounds, which have earned it the name of sea canary.
The toothless, or baleen, whales belong to the suborder of Mysticeti. This is a group of generally large whales, formerly abundant in all the oceans of the world. Though reduced by hunting, most species are still found along the coasts of the United Stated and Canada. All but two of the Mysticeti reach 40 feet or more at maturity, with the blue whale running up to 100 feet and tipping the scales at up to 130 tons. This whale is by far the largest creature that has ever lived on earth, 4 times the weight of the largest dinosaur, 30 times that of an elephant.
The author compares the beluga whale with ______.
选项
A、a bird
B、a giant
C、an elephant
D、a submarine
答案
A
解析
本题考查学生对生词的推断。文章第一段倒数第二句“And it does chirp”中,如果不知道“chirp”的词义,则下一句“In fact,it makes a great variety of squeaking,whistling,and clicking sounds,which have earned it the name of sea canary”指出,“它发出各种尖叫声、啸声和卡嗒声,因此获得大海金丝雀的美称”,可见作者把它比作了鸟儿,因此选A。
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