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Growing levels of pollution represent a serious health hazard to the,local population.
A:protection
B:indication
C:immunity
D:danger
B:indication
C:immunity
D:danger
参考答案
参考解析
解析：本句意思：日益严重的污染对当地人民的健康构成了重大威胁。hazard危险，危害。protection 保护，防卫；indication表明，标示，象征，显示；immunity免疫力，豁免，免除；danger危险，危险物，威胁。
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B:indication
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D:danger
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