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题型:选词填空-短文选词填空 难度:0.65 引用次数:149 题号:15047096
阅读下面短文,掌握其大意,然后从方框中选出能填入文中空白处的最合适的单词,注意,其中有两个多余选项。
A. color     B. bones   C. shape     D. cells     E. hide     F. dangerous
G. change   H. go     I. reflect     J. another   K. odd     L. amazing

Octopuses are masters on disguise (伪装). They can change their appearance in less than a second.

How do they do this? An octopus can disguise itself in three ways. One is by using     1    . An octopus's skin has special     2     called chromatophores. These cells are filled with yellow, brown, and red pigment (色素). When an octopus moves its muscles in a certain way, the cells produce colorful spots on its skin. Chromatophores can also     3     light. In blue light, for example, an octopus's skin will look blue. An octopus can also change its skin texture (皮肤结构). When the octopus moves its muscles, its skin can     4     unsmooth. It might then look like a plant, or coral. And     5     way an octopus disguises itself is by changing its     6    . Some, for example, roll their bodies into balls so they look like rocks. One type of octopus can change its form to look like other sea creatures — especially     7     ones, such as sea snakes.

Why are octopuses so good at disguising themselves? They have to be. The ocean is not a safe place for them. Because they have no     8     in their bodies, octopuses are like large pieces of meat. Many predators (捕食者) want to eat them — and they can eat them whole. To survive, octopuses have developed the     9     ability to change their appearance very quickly in order to     10     from predators.

【知识点】 动物 科普知识

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【推荐1】根据上下文语境,选择合适的单词填入空白处,每个单词仅使用一次,每个方框里有一个是多余的单词。
A. adapt to       B. stir up        C. are dying out       D. makes out       E. search for       F. be aware of

The World Wide Fund for Nature (WWF) is concerned about the many species of plants and animals that     1     around the world. The WWF wants more people to     2     the problem. So they will stop hurting wildlife and     3     solutions. Very few people in modern society actually intend to harm animals. Most people do not realize that many animal species can’t     4     the changes brought about by modern civilization. It is for this reason that the WWF constantly puts up information to    5    public interest in the welfare of the planet.

2023-05-29更新 | 27次组卷
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文章大意:本文是一篇说明文。文章主要介绍了一项发表在《环境科学与技术》杂志上的研究发现,该研究表明科学家们正在尝试使用蜻蜓来确定生态系统中汞污染的范围。
【推荐2】Fill in each blank with a proper word given in the box. Each word can be used only once. Note that there is one word that you do not need.
A. predictions       B. tricky       C. determine       D. consumed       E. significant
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Using dragonflies as contamination(污染) detectors

Mercury(汞)pollution from power plants and mining operations can end up in our air and water.

But it’s     1     to predict just how much of that environmental mercury will make its way into our food—and our bodies.

“We were working on developing a bioindicator, a biosentinel, that could inform us of the levels of mercury contamination across the US.”

Ecologist Collin Eagles-Smith of the United States Geological Survey and his colleagues came up with a practical way to     2     the scope of mercury contamination in an ecosystem by measuring mercury levels in a single species. Their bioindicator: juvenile dragonflies, or larvae(幼虫). Dragonfly larvae stay underwater, don’t move much, are easy to collect and live long enough to accumulate     3     amounts of mercury.

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The team measured mercury     5     in thousands of dragonfly larvae collected from waterways in 100 national parks during a 10-year period. And to amass the large sample number, they recruited volunteers through the Dragonfly Mercury Project.

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“And that can inform future management actions to     10     the factors that are promoting the mercury production or simply inform agencies that may want to evaluate whether or not fish consumption advisories(警告)are necessary. ”

The study is in the journal of Environmental Science & Technology.

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Last season alone, several New Jersey pepper farmers saw 75% of their crops damaged. Pennsylvania lost half of its peach population, and, according to the US Apple Association, apple farmers in the mid-Atlantic states lost $37 million. This year could be worse. As a result of this     5     in the supply of fresh fruits and vegetables, shoppers have seen     6    —sometimes quite dramatic—in prices at the grocery store. Prices of apples in Maryland are up 8%. In the north-Atlantic states, prices for peppers shot up an astonishing 14%. Not only are these items becoming more expensive, but they are also getting harder to find. Last week, Marge Jenkins of Athens, Georgia reported having to check three different stores before encountering a decent batch of peas. And this, she assures us, is a regular       7    . Accidentally brought from Asia, the stink bug has no natural     8     in America, and thus its population is rising sharply. Reported sightings of stink bugs are becoming increasingly numerous, as the dried, brown, trapezoidal(不规则四边形) shells of the dead bugs are everywhere in some areas. This has farmers and scientists alike     9     their heads in search of a remedy. Hope, they believe, may lie with an Asian parasitic wasp(黄蜂), which helpfully lays its eggs inside stink bug eggs.

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2019-04-17更新 | 114次组卷
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