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职称英语
These machines have raised______ many times.A、proficiencyB、frequencyC、efficien
These machines have raised______ many times.A、proficiencyB、frequencyC、efficien
游客
2025-04-03
15
管理
问题
These machines have raised______ many times.
选项
A、proficiency
B、frequency
C、efficiency
D、effect
答案
C
解析
efficiency n.效率;功效(如:to increase efficiency.She admired his efficiency.)。proficiency n.熟练,精通。frequency n.次数,频繁;频率,出现率。effect n.结果;效果,作用,影响。
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