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討論串[計量] 一題數學請教
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Alan worked 5 hours in the library moving books and completed half the job.. Dan joined him and they finished job in 1 hour. How long would it have ta
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ADVANCED PURCHASE DISCOUNTS FOR AIRLINE TRAVEL. Days Prior to Departure Pecentage Discount. 0-6 days 0%. 7-13 days 10%. 14-29 days 25%. 30 days or mor
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