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托福阅读词汇题：indefinite period

2015-08-14 14:55:06来源：网络

　　【托福阅读题型：indefinite period词汇题】托福阅读中词汇题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

　　查看全部：托福阅读题型分类练习之词汇题

　　托福阅读词汇题：indefinite period

　　【Paragraph 4】Reduction in numbers of game should have boded ill for their survival in later times. A worsening of　the plight of deer was to be expected as settlers encroached on the land, logging, burning, and clearing, eventually　　replacing a wilderness landscape with roads, cities, towns, and factories. No doubt the numbers of deer declined still further. Recall the fate of the Columbian white-tailed deer, now in a protected status. But for the black-tailed deer, human　pressure has had just the opposite effect. Wildlife zoologist Helmut Buechner(1953), in reviewing the nature of biotic　changes in Washington through recorded time, says that "since the early 1940s, the state has had more deer than at any　other time in its history, the winter population fluctuating around approximately 320,000 deer (mule and black-tailed　deer), which will yield about 65,000 of either sex and any age annually for an indefinite period."(Deer Populations of the　Puget Sound)

　　! The phrase “indefinite period” in the passage is closest in meaning to period

　　○ whose end has not been determined

　　○ that does not begin when expected

　　○ that lasts only briefly

　　○ whose importance remains unknown

　　答案见下一页：

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