問題詳情

50 What is the main idea of the passage?
(A) The Arctic is not only an indicator of global warming but also a main cause of it.
(B) The Paris deal is the only solution to slowing down the Arctic’s ice shrinkage rate.
(C) The organic contents released in the Arctic’s melting process will benefit global economy.
(D) There is not enough study about the global warming that Earth is undergoing.

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