The agricultural Adjustment Act was an attempt to deal with the farmers’ problem of ————
A. soil erosion
B. declining labor supply
C. inflation
D. overproduction
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Choose the correct word to match the given English meaning.[ typical / trust / percent / product ]___________ (n) one part of 100____________ (n) something that is made for sale____________ (v) to believe someone or something___________ (adj) usual, representative
在MySQL中,可以使用()根据一个或多个字段进行分组,可以使用()对分组数据进行筛选。
在MySQL中,默认情况下为分组操作的字段提供了()排序功能。