Question

    A great number of species make their home in the vast waters of the Atlantic Ocean. Although the entire ocean makes up an ecosystem, many smaller habitats are found within, including an open-water habitat off the coast of the Northern Atlantic Ocean known as the Sargasso Sea. Sargassum is an alga(海藻) that floats in masses that can continue for miles. The waters of the Gulf Stream push the water in a northward move into this area. This constant move and varying temperature support the accumulation of the brown-colored seaweed.

The Sargasso Sea is so enormous that one method of information collection has not been enough for scientists to obtain an accurate picture of what takes place within this ecosystem. Researchers have needed to employ several methods of sampling. Methods such as dragging nets over the surface of the water and videotaping beneath areas of sargassum have served scientists well.Information collected has shown that the Gulf Stream pushes brown algae from open water into the Sargasso Sea area, creating a diverse floating habitat in an area that would otherwise not support that wildlife.

In the most recent study of the sargassum community off the shores of North Carolina, eighty-one fish species were documented as using the area as a microhabitat.This is an increase from previous studies. The types of fish found here are both commercially and environmentally important.The South Atlantic Fishery Management Council is working to regulate the harvesting of sargassum. The Council hopes to have the area classified as an Essential Fish Habitat. Which would afford it certain protections.

Further research needs to be done before scientists understand how to best protect the Sargasso Sea as well as understand how it goes about supporting so many important types of wildlife.

1.The author uses “enormous” in paragraph 2 to stress that       .

A.the Atlantic Ocean is really amazing in terms of its size and area

B.what the researchers do is highly respected by scientific community

C.the research work is complex because a large area must be covered

D.a large amount of money for the Sargasso Sea research is needed

2.It can be inferred from the phrase“needed to be done”in paragraph 4 that the author thinks       .

A.the Sargasso ecosystem is worth our attention and needs more study

B.the scientific community has ignored this complex ecosystem

C.the Sargasso Sea is becoming a problem and needs removing

D.new methods for researching the ecosystem must be found instantly

3.The text is mainly about           .

A.diversity of wildlife in the Atlantic Ocean

B.different habitats of sea animals

C.methods of information collection

D.the Sargasso Sea as an entire ecosystem

Answer

1.C

2.A

3.D

【解析】

这是一篇说明文。主要说明了马尾藻海这个完整的生态系统，非常巨大以至于一种信息收集方法不足以让科学家准确了解这个生态系统中发生的情况，这里发现的鱼类种类在商业和环境上都很重要。南大西洋渔业管理委员会正在努力管制马尾藻海的捕捞。这将为马尾藻海提供一定的保护。

1.推理判断题。结合下文one method of information collection has not been enough for scientists to obtain an accurate picture of what takes place within this ecosystem一种信息收集方法还不足以让科学家准确地了解在这个生态系统中发生了什么，可知作者在第2段中使用了“enormous”一词，是为了强调研究工作很复杂，因为必须覆盖很大的区域。故选C。

2.推理判断题。结合下文before scientists understand how to best protect the Sargasso Sea as well as understand how it goes about supporting so many important types of wildlife在科学家们了解如何最好地保护马尾藻海以及如何救助这么多重要的野生动物之前，还需要做进一步的研究。可知从第4段“need to be done”一词可以推断，作者认为马尾藻生态系统值得我们关注，需要更多的研究。故选A。

3.主旨大意题。根据文章第一段中Although the entire ocean makes up an ecosystem, many smaller habitats are found within, including an open-water habitat off the coast of the Northern Atlantic Ocean known as the Sargasso Sea.（虽然整个海洋构成了一个生态系统，但在其中发现了许多较小的栖息地，包括北大西洋沿岸的一个被称为马尾藻海的开放水域栖息地。）以及文章内容为关于马尾藻海的一些研究说明，可知文本主要是关于作为一个完整的生态系统的马尾藻海。故选D。