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【单选题】
下列说法正确的是
A.
苯中含有的苯酚杂质可通过加入足量溴水后过滤的方法而除去
B.
苯乙烯中至少有8个碳原子在同一个平面
C.
等质量的乙烯和聚乙烯完全燃烧，产生的二氧化碳的质量之比为1：1
D.
分子式为C 5 H 10 O 2 且可与氢氧化钠溶液反应的有机化合物有14种（不考虑立体）
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【单选题】A modified rebuy purchase decision occurs in each of the following situations except :
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B.
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【单选题】If a potential vendor offers what is perceived by a member of the buying center to be a better buy, the company may want to revisit the purchase decision. This type of situation is typically a:
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【判断题】The modified rebuy is when a company plans to buy a product or service for the first time.
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【判断题】A modified rebuy is a reorder from the same vendor.
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B.
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【单选题】A modified rebuy is most likely to occur when:
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B.
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