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[P9-49] If you want this pain-killer, you'll have to ask the doctor for a ______. A) receipt B) recipe C) subscription D) prescription 注：1. pain-killer 止疼片 2. prescription 药方 3. receipt 收据 4. recipe 菜谱；秘诀 [P9-50] Some fish have a greater __________ for acid water than others. A) tolerance B) resistance C) dependence D) persistence 注：1. tolerance 忍耐，忍受 2. resistance 抵抗 3. dependence 依赖 4. persistence 恒定不变，坚持，持续 [P9-51] There was once a town in this country where all life seemed to live in _____ with its surroundings. | 
