In American universities, classes are often arranged in more flexible______and m

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问题 In American universities, classes are often arranged in more flexible______and many jobs on campus are reserved for students.

选项 A、scales
B、patterns
C、grades
D、ranks

答案 B

解析 名词词义辨析。scales“规模,尺度”;patterns“模式,方式”;grades“等级,年级”;ranks“等级,阶层”。句中的flexible能与patterns搭配且符合逻辑。故答案为B。
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