Citrus fruit - oranges, grapefruit, lemons, and limes - are produced in Florid and California.
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The thick part,or curd,was the first cheese.
The last course of a Western dinner is the dessert,which is something sweet, such as fruit pie and ice cream.
所谓分类汇总，就是在数据清单中按用户指定的列对数据进行分类，然后按类对相关列的值进行求和、求平均、计数等计算。
A. 对
B. 错
进行分类汇总操作之前，必需先按分类字段对数据清单的记录进行排序。
A. 对
B. 错
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