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試卷名稱：99年 - 2010 iGeo_MMT國際地理奧林匹亞競賽_地理#81779
年份：99年
科目：奧林匹亞地理
9. Foraminifer are tiny animals that are important in the food chain. The shells of foraminifer in the Southern Ocean have reduced in weight by about 30% since pre-industrial times. What has caused this?
(A)changes in diet
(C)evolution
(B)sea level rise
(D)ocean acidification
