单选题：Howtojudgeifwhaleswillbecomeextinct?

  • 题目分类：英语六级
  • 题目类型：单选题
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题目内容：

Howtojudgeifwhaleswillbecomeextinct? A．Itsbirthrateiscontinuouslylowerthanitsdeathrate.
B．Whales'reproductiveabilityremainsaverylowrate.
C．Thespeciesofwhalesisdoomedtoextinction.
D．Whales'deathratekeepsanincreasingtrend.

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