9.根据跨品类分析法，零售商的品类通常被分成四个单元，即目标性品类、常规性品类、________品类和________品类。
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10.品类角色划分并不是一个_______的工作，零售商做完一次品类的定位后也是不能一劳永逸的。
Road (work) ____ often cause major traffic delays.
It has become a (grow) ____ cultural, commercial and tourist center.
There is a (mix) _____ of many different nationalities in America.
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