题目：
In a certain flower shop, which stocks four types of flower there are
as many violets as carnation，and
as many tulips as violets．If there are equal numbers of roses and tulips，what percent of the flowers in the shop are carnations
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A解析： (第一项-第二项)×=第三项，以此类推，
