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【单选题】
Zooxanthellae（虫黄藻） are essential to reef-building corals because they
A.
Provide the coral with carbon dioxide
B.
Filter-out harmful solar radiation
C.
Provide the coral with protection from predators
D.
Provide the coral with nutrient
举报
题目标签：黄藻
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三