Atropicalfishthatlivesinmangroveswamps（湿地）acrosstheAmer...

问题详情：

A tropical fish that lives in mangrove swamps（湿地） across the Americas Can survive out of water for months at a time，similar to how a11iIlals adapted to land millions of years ago。a new study shows．

  The Mangrove Rivulus，a type of small tropical killifish。seeks refuge in shallow pools of water in crab Caves，nut shells or even old beer cans in the tropical mangrove swamps of Belize，the United States and Brazil．

    When their living place dries up，they group together on the land in hollowed logs（圆木）and breathe air through. their skin instead of their gills （腮） until they can find water again．The fish，whose scientific name is Rivulus Marmoratus，can grow as large as three inches．

    The scientific breakthrough came after a trip to Belize．

    “We kicked over a log and the fish just came dropping out，”Taylor told Reuters in．neighboring Guatemala by telephone．He said he will publish his study on the fish in The American Naturalist journal early next year．

    In lab tests，Taylor said he found the fish Can survive for up to 66 days out of water without eating， and their metabolism（新陈代谢） keeps functioning．

    Some other fish Can survive briefly out of water．The walking catfish found in Southeast Asia call move about over land for hours at a time，while lungfish found in Australia，Africa and South America can survive out of water，but only in a sleeping state．

    No other known fish Can be out of writer as long as the Mangrove Rivulus and remain active．according to Patricia Wright，a biologist at Canada’s University of Guelph．

   “These animals live in an environment that is similar to conditions that existed millions of years ago，when animals began making the evolution（进化） from water onto land，”she said．

1．The underlined word“refuge”in paragraph 2 probably refers to          “

A．shelter                 B．food             C．water            D ．companion

2．The writer mentions the catfish and lungfish in the passage with the aim to            

      A．tell us that the Mangrove Rivulus is much larger

      B．show that there are many other fish that Can live out of water

      C．make a comparison with the Mangrove Rivulus

      D．tell us that there is a long way ahead in the study about fish

3．How does the scientific breakthrough about Rivulus come out?

      A．Scientists found it accidentally and made some experiments．

      B．Local people in mangrove swamps across the Americas discovered it

      C．Reuters reporter offered the news to a scientist by telephone．

      D．Lab study shows scientist its living place．

4．The Mangrove Rivulus is quite different from other fish because it can           

      A．live for a period of time out of water without eating

      B．breathe with their lung in a sleeping state

      C．grow as large as three inches

      D．survive out of water much longer and remain active

5．What does the last sentence of the passage imply?

      A．The fish can live a life as long as millions of years．

      B．The fish will be helpful in studying the evolution of animals．

C．The environment on earth is still the same as it was millions of years ago．

D．Animals begin making evolution from water onto land nowadays．

【回答】

ACADB

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