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rpose of the third paragraph is . A.to analogy how the spiny spider use color to catch preyB.to describe lively the method spiny spider usesC.to describe the detail about casinosD.to tell the readers why the insects are attracted by spiny spider 参考答案： A 将刺蜘蛛吸引猎物的方法和赌场吸引顾客的方法进行类比，形象生动。----------------------------------------3According to this passage, which of the following is NOT true? A.Color is usually uses to attract mates in the animal kingdom, which is known long by human beings.B.Generally, bright colors can only make other animals alterative.C.Animals using traips usually haven’t bright colors and contrasting patterns.D.Parrots also have bright colors because they use color to entice prey like spiny spider. 参考答案： D 由第六段第三句可以看出来，鹦鹉的色彩是为了和雨林融为一体，保证自己不被猎物发现。----------------------------------------4The experiment Hauber has done can tell us that . A.spider with the black color caught less prey than those with their normal colorful stripesB.the colors and patterns of spiny spider are like some flowers for visually oriented preyC.the dorsal surface of the spiny spider is highly reflective in the ultraviolet part of the spectrumD.in enticing prey, bright colors and patterns can help spiny spiders a lot 参考答案： D Hauber的试验中，涂黑的蜘蛛总是捕获猎物少，说明背部颜色和花纹对于 刺蜘蛛捕食猎物很重要。----------------------------------------5The proper title for this passage should be . A.The Study on How Spiny Spiders Entice PreyB.Spiny Spiders Use Color to Entice Prey, Not MatesC.The Difference Between Spiny Spider and Other AnimalsD.The Using of Colors in Enticing Prey 参考答案： B 此项最能概括全文的整体意思。其它项都不够准确和明晰。----------------------------------------1At present, the main causes about Alzheimer’s learned by people are those except . A.genetic fac
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