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搜题
【单选题】
From the last paragraph we learn that
A.
the seas we will depend on for future food have been more or less contaminated.
B.
the marine resources are directly bound up with our future life.
C.
the exploitation drives are essential for us to improve the quality of llfe on the earth.
D.
the ecological balance in the seas has nothing to do with that on the land.
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聚丙烯
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B.
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