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  3. In a surprising interaction at sea, huge whale sharks follow fishing nets near the island of New Guinea—and fishermen distribute

In a surprising interaction at sea, huge whale sharks follow fishing nets near the island of New Guinea—and fishermen distribute

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问题     In a surprising interaction at sea, huge whale sharks follow fishing nets near the island of New Guinea—and fishermen distribute snacks to the stealing beasts in small【C1】______.
    The biggest fish in the sea is as long as a school bus, weighs as much as 50,000 pounds, and has a【C2】______ that looks, head-on, wide enough to suck down a small car.【C3】______ this distinctive profile, scientists know very 【C4】______ about the whale shark. Sharks breathe like fish. They are coldblooded, like fish. The "whale" , part of the name,【C5】______ size and how the animals eat. They are one of the only three known shark【C6】______that filter feed,【C7】______ some whales do, swimming slowly through water. Water goes in carrying【C8】______ of all sizes, and water without food flows out.
    The giant fish is hard to study 【C9】______because it is hard to find and 【C10】______. By tagging individual specimens, scientists have learned that whale sharks can log thousands of miles in years-long trips.【C11】______they sometimes disappear for weeks,【C12】______ more than a mile down and resting in the chilly deep for a【C13】______. No one has ever found their【C14】______or birthing grounds.
    Whale sharks are【C15】______ loners. But not in one corner of Indonesia. The photographs on these pages, 【C16】______ some eight miles off the province of Papua,【C17】______ a group of sharks that【C18】______ fishermen each day, zipping by one another, looking for【C19】______ near the surface, and nosing the nets—a【C20】______ instance when the generally gentle fish act, well, like the rest of the sharks.
【C6】
选项 A、species
B、categories
C、classes
D、varieties
答案A
解析 名词辨析题。句意为：像一些鲸鱼一样，鲸鲨是仅有的三个为人所知的过滤食物的鲨鱼品种之一。四个选项中，[A]species用于生物学中，表示“物种，种类”，故为答案。[B]categories“类别，范畴”，多用于对事物的划分、分类；[C]classes“阶级，种类”，生物学中表示“纲”，大于species；[D]varieties“品种，变种”，可用于指植物、语言或基因，尤指同类物品的不同品种。
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