Brand R coffee costs $3. 25 per pound and brand T coffee costs $ 2. 50 per pound. Column A Column B The number of pounds of brand R in a 1. 2 mixture of brands R and T that costs $3. 00 per pound A．if the quantity in Column A is greater B．if the quantity in Column B is greater C．if the two quantity are equal D．if the relationship cannot be determined from the information given
A. Column B.if C.if D.if E.if
【参考答案】
D 解析：R牌咖啡每磅$3.25，T牌咖啡每磅$2.50。解：本题的正确为(D)。比较的左项为R与T混合后每磅值......