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2016年3月SAT北美阅读真题解析+答案(六)

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   小编特地为您整理2016年3月SAT北美阅读真题解析+答案(六)相关资料,快来下载领取吧!2016年3月SAT北美阅读真题解析+答案(六)资料小编整理不易,每一份资料都是值得我们仔细去钻研的。同学们如果想顺利考出优异的成绩,提前一系列备考工作一定不要忘了哦.只有真正将资料吃透,考试时候才能得心应手。下面我们一起来看看资料内容,希望能给大家的备考带来更多的启发。

  Questions 1-11 are based on the following passage.

  Mudskippers

  Mudskippers, just like other spend

  a significant ortion of life on land.

  Rather than being activated at different stages of the organism's life cycle or under particular environmental conditions, Ithese two modes of respiration are used simultaneously and at all stages of life.

  mudskippers absorb oxygen mainly through their

  ills while underwater. However studies have shown that as much as 40 percent of their aquatic respiration can

  be skin based. On land, both modes are still important. When leaving the water, in preparation for less aqueous conditions, mudskippers fill their gill chambers with water from which they can later extract oxygen. out of the water , when the amphibious fish are hopping along tidal mud flats or the edges of mangrove swamps, approximately 50 to 60 percent of respiration occurs through the skin, while respiration using their water-ftlled gills accounts for the remaining 40 to 50 percent.

  Due to their ability to respire both on land and in the water, mudskippers have a significant advantage over other fish and even over some land-based animals. Bimodal respiration makes it II a snap for mudskippers to live in areas subject to drastic changes in water level and chemical composition.

 

  II Despite this, mudskippers thrive in intertidal regions that are marked by regular, cyclical changes in water levels, adjusting,lli respiration depending on how much water is available. This lifestyle also gives them the ability to search farther and in more diverse locales than other organisms in the hunt for food, reproductive opportunities, and optimal environmental conditions.

 

 

 

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