問題詳情

      The beavers at the Minnesota Zoo seem engaged in an unending task. Each week they fell scores of inch-thick youngtrees for their winter food supply. Each week zoo workers surreptitiously replace the downed trees, anchoring new ones inthe iron holders so the animals can keep on cutting. Letting the beavers do what comes naturally has paid off: Minnesotais one of the few zoos to get them to reproduce in captivity. The chimps at the St. Louis Zoo also work for a living: theypoke stiff pieces of hay into an anthill to scoop out the baby food and honey that curators hide inside. Instead of idlyawaiting banana handouts, the chimps get to manipulate tools, just as they do in the wild. Last year, when 13 gorillasmoved into Zoo Atlanta’s new $4.5 million rain forest, they mated and formed families—a rarity among captives. “Zooshave changed from being mere menageries to being celebrations of life,” says John Gwynne of the Bronx Zoo. “As thewild places get smaller, the role of zoos gets larger, which means intensifying the naturalness of the experience for bothvisitors and animals.”
46 What do the beavers do at the Minnesota Zoo?
(A) They are engaged in a task to find baby food.
(B) They are busy making tools for their winter food.
(C) They keep cutting down young trees for their winter food.
(D) They do nothing but idly awaiting winter food.

參考答案

答案：C
難度：適中0.660377
統計：A(4),B(13),C(35),D(0),E(0)

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