2017年新课标全国卷3高考英语试题阅读理解C篇

After years of heated debate, gray wolves were reintroduced to Yellowstone National Park. Fourteen wolves were caught in Canada and transported to the park. By last year, the Yellowstone wolf population had grown to more than 170 wolves.

Gray wolves once were seen here and there in the Yellowstone area and much of the continental United States, but they were gradually displaced by human development. By the 1920s, wolves had practically disappeared from the Yellowstone area. They went farther north into the deep forests of Canada, where there were fewer humans around.

The disappearance of the wolves had many unexpected results. Deer and elk populations — major food sources (来源) for the wolf – grew rapidly. These animals consumed large amounts of vegetation (植被), which reduced plant diversity in the park. In the absence of wolves, coyote populations also grew quickly. The coyotes killed a large percentage of the park’ s red foxes, and completely drove away the park’ s beavers.

As early as 1966,biologists asked the government to consider reintroducing wolves to Yellowstone Park.They hoped that wolves would be able to control the elk and coyote problems.Many farmers opposed the plan because they feared that wolves would kill their farm animals or pets.

    The government spent nearly 30 years coming up with a plan to reintroduce the wolvers. The U.S.Fish and wildlife Service carefully monitors and manages the wolf packs in Yellowstone.Today,the debate continues over how well the gray wolf is fitting in at Yellowstone.Elk,deer,and coyote populations are down,while beavers and red fores have made a comeback.The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.

经过多年的激烈争论，灰狼被重新引入黄石国家公园。14只狼在加拿大被捕获并被送往公园。到去年，黄石公园的狼数量已经增长到170多只。

 灰狼曾经在黄石地区和美国大陆的大部分地区随处可见，但随着人类的发展，灰狼逐渐被取代。到20世纪20年代，狼几乎已经从黄石地区消失了。他们进一步向北进入加拿大的森林深处，那里的人类较少。

 狼群的消失带来了许多意想不到的结果。鹿和麋鹿种群——主要食物来源(来源) 对于狼来说——生长迅速。这些动物消耗了大量的植被(植被), 这降低了公园中的植物多样性。在没有狼的情况下，郊狼的数量也迅速增长。郊狼杀死了公园里很大一部分的赤狐，并完全赶走了公园里的海狸。

 早在1966年，生物学家就要求政府考虑将狼重新引入黄石公园。他们希望狼能够控制麋鹿和郊狼的问题。许多农民反对这项计划，因为他们担心狼会杀死他们的农场动物或宠物。

 政府花了近30年的时间制定了一项重新引入沃尔弗斯的计划。美国鱼类和野生动物管理局仔细监测和管理黄石公园的狼群。今天，关于灰狼在黄石公园的适应程度的争论仍在继续。麋鹿、鹿和郊狼的数量减少了，而海狸和红包皮又卷土重来。黄石公园的狼项目是一项有价值的实验，有助于生物学家决定是否将狼重新引入美国其他地区。

句子成分分析：

Gray wolves once were seen [here and there] [in the Yellowstone area and much (of the continental United States)], 

|| but they were [gradually] displaced [by human development].

句子语法结构详解：

(seen 为 see 的过去分词。wolves 为 wolf 的复数形式。)

* seen 为谓语，采用一般过去时和被动语态。
* but 为并列连词，连接并列句，表转折。
* displaced 为谓语，采用一般过去时和被动语态。
* they 为人称代词主格。much 为不定代词。were 为助动词。the 为定冠词。

句子相关词汇解释：

Phrase:

Vocabulary:

句子成分分析：

The coyotes killed a large percentage (of the park 's red foxes), and completely drove away the park' s beavers.

句子语法结构详解：

(drove 为 drive 的过去式。)

* killed 为谓语，采用一般过去时。
* drove 为谓语，采用一般过去时。
* the 为定冠词。a 为不定冠词。

句子相关词汇解释：

Phrase:

Vocabulary:

句子成分分析：

[Today],the debate continues [over {how well the gray wolf is fitting in}] [at Yellowstone.Elk], deer, || and coyote populations 

are down, || while beavers and red fores have made a comeback.

句子语法结构详解：

(made 为 make 的过去分词。)

* continues 为谓语，采用一般现在时。动词采用第三人称单数形式。
* how 为连接副词，引导宾语从句。
* fitting 为谓语，采用现在进行时。
* 第1个 and 为并列连词，连接并列句。
* are 为系动词作谓语，采用一般现在时。
* while 为连词，引导状语从句。
* made 为谓语，采用现在完成时。
* is, have 为助动词。the 为定冠词。a 为不定冠词。

句子相关词汇解释：

Phrase:

Vocabulary:

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