40 Human-induced overexploitation, ocean acidification and pollution_____ the integrity of marine ecosystems.
(A)threaten  
(B)promote
(C)increase
(D)  integrate 

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統計： A(90), B(5), C(19), D(2), E(0) #1809394

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(A)威脅(B)促進(C)增加(D)整合...
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Human-induced誘使 overexploitation過度開發, ocean acidification酸化 and pollution_____ the integrity完全 of marine ecosystems生態系統. 

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