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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
95
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.
According to the passage, which of the following accurately describes the relative sizes of two whales?
选项
A、The blue whale is larger than the sperm whale.
B、The beluga is larger than the blue whale.
C、The killer whale is larger than the sperm whale.
D、The porpoise is larger than the killer whale.
答案
A
解析
本题为细节题。文章多处提到了几种鲸的大小。而第二段有一句“This whale is by far the largest creature that has ever lived on earth”,其中“This whale”指的是“blue whale”,可见蓝鲸是所有鲸中最大的,因此选A。
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