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【OG20-P281-327题】
Jones has worked at Firm X twice as many years as Green, and Green has worked at Firm X four years longer than Smith. How many years has Green worked at Firm X?1. Jones has worked at Firm X 9 years longer than Smith.2. Green has worked at Firm X 5 years less than Jones.
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D
【知识点】twice as many a as b的意思是a=2b
【解析】
假设Jones,Green,Smith工作年份分别是J,G,S,已知J=2G,G=S+4,求G
条件1:J=S+9,解得G=5,充分
条件2:J-5=G,解得G=5,充分
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