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  3. They postulated a 500-year lifespan for a plastic container.A:challenged B:assu

They postulated a 500-year lifespan for a plastic container.A:challenged B:assu

admin2020-12-24  17
问题 They postulated a 500-year lifespan for a plastic container.
选项 A:challenged
B:assumed
C: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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