問題詳情

四、閱讀測驗In a summer camp, the scientist, Orley R. Taylor, was demonstrating the procedure of “tagging the butterflies.”He told a dozen small-game hunters, “Pinching a bright orange butterfly in one hand and a sticky tag the size of ababy’s thumbnail in the other, you want to lay it right on this cell here, the one shaped like a glove.” Thesmall-game hunters are about 7 years old and each of them is armed with a net. “If you pinch it for about threeseconds, the tag will stay on for the life of the butterfly, which could be as long as nine months.”Dr. Taylor runs theMonarch Watch project at the University of Kansas. He is using the tags to follow one of the great wonders of thenatural world: the annual migration of monarch butterflies between Mexico and the United States and Canada.Butterfly enthusiasts were looking forward to the northward migration this spring. It was the biggest in manyyears. The 4,000-mile round trip made by millions of monarchs is a central mystery that Dr. Taylor and a network ofentomologists are trying to solve. It is said that monarchs are one of the few creatures on earth that can orientthemselves both in latitude and longitude—a feat that, Dr. Taylor notes, human sailors did not manage until 1700’s.In light of the threat to the migration, however, a drought in the Dakotas and Minnesota may preventbutterflies from starting their return trip. In addition, the journey is likely to be a death march because of the lack ofhurricanes that normally soak the Texas grasslands and sprout the nectar-heavy wildflowers for the monarchs torefuel. Moreover, the biologist at Sweet Briar College, Lincoln P. Brower, warned that nowadays the biggest threatto the migration is the steady friction of forests resulting from illegal logging. Although the government turned366,000 acres into a butterfly sanctuary, it has failed to protect them. Nearly half the preserve has been logged since1984.“It’s unconscionable,” Dr. Brower said. “If it isn’t stopped, I’m afraid the whole migration will unravel.”
46. What is this passage mainly about?
(A)The life of an entomologist.
(B)The anecdote of a biologist.
(C) The story of the butterfly enthusiasts.
(D)The annual migration of monarch butterflies.

參考答案

答案：D
難度：適中0.672414
統計：A(4),B(7),C(8),D(39),E(0)

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