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The DDT and other pesticides of its type tend to be endlessly recycled in the food chains on which birds, animals and man himself are completely dependent.

  • A.The food chains for living creatures depend on the recycling of those chemicals.
  • B.The cycle of those chemicals in the food chains for living creatures never stops.
  • C.There is always a great influence of those chemicals on the food chains.
  • D.No living creatures can live without those chemicals in their food.
试题出自试卷《综合英语(二)2017年4月真题试题及答案解析(00795)》
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