Whileglobalwarmingandoceanacidificationdrivenbypollu...

問題詳情：

    While global warming and ocean acidification driven by pollution cause a real threat to sea creatures, climate change is not the primary driver threatening to cause the extinction (滅絕)of large ocean animals. It is humans that are threatening large sea creatures primarily by hunting and fishing them.

    Researchers  findings reflect a phenomenon experienced by ancient land ecosystems (生態系統）e losses in the ocean are paralleling what humans did to land animals sonic 50,000 to 10,000 years ago. when we wiped out around half of the big-bodied mammals on Earth, like mammoths, mastodons. saber-tooth cats and the like.

     The increasing threat to large groups of sea animals is a recent phenomenon. The researchers made this discovery by comparing characteristics of nearly 2,500 extinct sea vertebrates and mollusks alongside others currently in danger of extinction. They found that smaller sea animals were a little more likely than large ones to be killed off during five previous mass extinction events—the most recent of which was associated with a small planet's strike some 65 million years ago.

      What was surprising to the reseachere was  that they did not see a similar kind of pattern in any of the previous mass extinction events that they studied.

     The study shows that a sixth mass extinction, which may already be underway  could kill off larger-bodied animals while leaving smaller ones behind. That could have a terrible long-term  impact.

      Such removal of the largest animals from the modern oceans, which never happened in the history of animal life，may disturb the order of ecosystems for millions of years even at levels of taxonomic loss far below those of previous mass extinctions.

     This news should serve as ii wake-up call for humans to fundamentally change the way they manage the oceans. That is to say，it is a warning of what will happen if we don’t get our act together.

      Limiting industrialization of the oceans may be necessary to give threatened animals time and space to recover. Most whaling has been banned since the 1980s. We have brought gray whales back from the edge of extinction and blue whales are coming back too.

     The researchers point out that cutting back on carbon emissions (排放) will also be  necessary lo slow extinctions.

58. Pantgraph 2 is intended to tell us that      .

    land animals and sea  animals die out because of humans

    -bodied animals were killed   as they were threat  to  humans

    C. humans tended to kill animals   on land instead of those in  seas

    D. humans have been main killers of animals for a very long time

59. What can we learn from the researcher's , studies about animal  

    extinction?

    A. It is easier for sea creatures to go extinct than land ones.

    B. The patterns of sea animal mass extinction are irregular.

    C. Humans were responsible for all (hose extinctions,

    D. Small-bodied creatucs produce I heir young more easily,

60. Which does the passage suggest is the most important in stopping sea

    animal extinction?

    A. To completely ban people from hunting them.

    B. To fully realize the urgency of protecting them.

    C. To unconditionally release kss  CO2 into the air.

    D. To reasonably keep control of   the trade in them.

【回答】

ABD

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