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  3. A mussel grips a hard surface very firmly to Scientists are not thinking of using mussels to produce the super glue mainly beca

A mussel grips a hard surface very firmly to Scientists are not thinking of using mussels to produce the super glue mainly beca

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问题 A mussel grips a hard surface very firmly to
Scientists are not thinking of using mussels to produce the super glue mainly because of
选项 A、their concern about the extinction of the species
B、their concern about the cost of collecting mussels
C、the possible mass-production of the super glue
D、the world’s limited demand for the super glue
答案A
解析 第四段第三句为本题提供了答案。
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