They postulated a 500-year lifespan for

恬恬2019-12-17 14

问题 They postulated a 500-year lifespan for a plastic container.

选项 A:challenged B:assumedC:deducted D:decreed

答案B

解析本句意思：他们假定塑料容器的寿命为500年。postulate假定，假设。challenge挑战；assume假设，假定；deduct减去；decree颁布（法令）。

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