13. Scientists have _______ that the greenhouse effect caused global warming.(A) debated (B) alterna

問題詳情

13. Scientists have _______ that the greenhouse effect caused global warming.
(A) debated
(B) alternated
(C) founded
(D) inherited

參考答案

答案：A
難度：困難0.207792
統計：A(16),B(12),C(36),D(5),E(0)

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