Poisonous vapors burst out of the factory during the accident, causing several hundred deaths.

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问题 Poisonous vapors burst out of the factory during the accident, causing several hundred deaths.

选项 A、gases
B、threat
C、fuels
D、bubbles

答案A

解析本句意思：在事故中，毒气从工厂溢出，导致数百人死亡。vapor意思是“汽，蒸气”，和gas(气体，汽油)意思相近。threat威胁；fuel燃料; bubble水泡，气泡。

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