People did not suddenly learn to use fire, but did so slowly over time with coun

游客2024-01-10  27

问题 People did not suddenly learn to use fire, but did so slowly over time with countless advances offset by______ period.

选项

答案 A,F

解析 offset说明前后反义重复。空格与advances(进步)反义重复。recessive退步的,fertile肥沃的,accumulated增长的,contemplative沉思的,explosive爆炸的,regressive退步的。答案选AF。
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