Losing amphibians means losing Scientists think that the decline of amphibians could

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问题 Losing amphibians means losing
Scientists think that the decline of amphibians could

选项 A、cause environmental change.
B、cause a decline in other kinds of animals.
C、be a warning signal for human beings.
D、be a good sign for human beings.

答案C

解析

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职称英语理工类A级

职称英语

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Losing amphibians means losing Scientists think that the decline of amphibians could

职称英语理工类A级

职称英语

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