Growing levels of pollution represent a serious health hazard to the local population.

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问题 Growing levels of pollution represent a serious health hazard to the local population.

选项 A、protection
B、indication
C、immunity
D、danger

答案D

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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