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1、安全教育学习是提高员工安全防范意识的重要措施。“百日安全活动”开展以来，保卫部从自身着手对本部门所有员工开展集中安全教育培训Module 6 课时跟踪练（一) Introduction & Reading Pre-reading.阅读理解AThere are some unusual things living in the worlds oceans: a “city” made up of tens of millions of relatives of starfish living on the peak of a seamount, or underwater peak north
2、of the Antarctic Circle; a huge, 16inch long by onequarterinch wide mollusk (软体动物), Chaetoderma felderi, discovered deep in the Gulf of Mexico near Louisiana; and enormous bacteria (细菌) in the eastern South Pacific that may help clean polluted ocean floors.Those are just some of the 5,300 new ocean
3、species that scientists have identified so far. The findings are a general situation of aquatic life. Scientists estimate that the number of sea creatures will come in around 230,000.Some 2,000 scientists from 82 countries are working on the project, which will eventually collect DNA “barcodes” for
4、many of them, estimates of changes in their populations and how they fit into the food chain, and Web pages with the Encyclopedia of Life, a project to put information about all known species online.Another striking finding is a “white shark cafe” a gathering of white sharks midway between Californi
5、a and Hawaii. In a March interview with CBC Radio One, marine scientist Barbara Block speculated (推测) that the sharks are meeting there to eat and socialise.As the research goes on, not only do scientists have a better picture of the distribution (分布) of the animals that stay in place, they are also
6、 approaching a global picture of the movements of animals.语篇解读：本文介绍了海底的情况，涉及科学家对海洋生物的研究。1Which of the following may make the polluted ocean floor clean?AStarfish.BMollusk.CBacteria. DSharks.解析：选C细节理解题。根据第一段可知，细菌可能对海底有清洁作用。2The underlined word “aquatic” in Paragraph 2 probably means _.Aoceanic Bimagi
7、nativeCvarious Dnewly found解析：选A词义猜测题。全文涉及的都是科学家对海洋生物的研究，因此此处也是指海洋生物的普遍情况。3We can learn from the passage that the scientists are working on _.Athe design of the new Web pagesBthe change of the food chainCthe feeding of white sharksDthe collection of DNA barcodes解析：选D细节理解题。第三段说明，收集海洋动物的条码是科学家的工作内容之一。
8、4What may be the scientists final goal?ATo find new ocean species.BTo learn the movements of white sharks.CTo draw a picture of the distribution of white sharks.DTo draw a global picture of the movements of animals.解析：选D推理判断题。根据最后一段可推知，这项研究会令科学家了解全球动物的分布并最终绘制出一幅海洋动物活动情况的全景图。BWindbreaks are barriers
9、(屏障) formed by trees and other plants. Farmers plant these barriers around their fields, which help prevent the loss of soil and stop the wind from blowing soil away. They also keep the wind from damaging or destroying crops. Besides, extra trees and plants can be cut down and used or sold for wood.
10、Windbreaks can be highly valuable for protecting grain crops. For example, in parts of West Africa grain harvests were twenty percent higher in fields protected by windbreaks compared to fields without them.But here is something interesting about windbreaks. They seem to work best when they allow so
11、me wind to pass through the barrier of trees or plants around a field. If not, then the movement of air close to the ground will lift the soil. Then the soil will be blown away. For this reason, a windbreak works best if it contains only 60 to 80 percent of the trees and plants that would be needed
12、to make a solid line. An easy rule to remember is that windbreaks can protect areas up to 10 times the height of the tallest trees in the windbreak.There should be at least two lines in each windbreak. One line should be large trees. The second line, right next to it, can be shorter trees or other p
13、lants with leaves. Locally grown trees and plants are considered the best choices for windbreaks. Trees reduce the damaging effects of wind and rain. Their roots help protect soil from being washed away. And trees can provide animals with shade from the sun.语篇解读：本文是说明文。介绍了防护林的有关知识。5The advantages of
14、 building a windbreak are as follows EXCEPT _.Akeeping the wind from destroying grain cropsBincreasing the production of grain harvestsCproviding humans with shade from the sunDreducing the damaging effects of wind and rain解析：选C细节理解题。根据第一段第三句“They also keep the wind from damaging or destroying crops
15、.”可排除A项；根据第二段第二句“. grain harvests were twenty percent higher in fields protected by windbreaks .”可排除B项；根据最后一段倒数第三句“Trees reduce the damaging effects of wind and rain.”可排除D项。故答案为C项。6The author thinks windbreaks are interesting because _.Athe movement of air lifts the soilBwindbreaks allow some wind to pass throughClarge trees are lined with short onesDwindbreaks can stop the wind getting through解析：选B细节理解题。根据第三段的前四句可知，防护林的有趣之处在于它可以允许一些风穿过防护林，从而防止土壤流失，故答案为B项。7If the trees grow to a height of 30 feet, the areas the windbreak can protect are _.A100 square feet B151 square feetC240 square f
