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About——of the students in the school were born in the ____.A.two-thirds:1990s B.two-third:1990s这道题为什么选择A?

题目详情
About——of the students in the school were born in the ____.A.two-thirds:1990s B.two-third:1990s
这道题为什么选择A?
▼优质解答
答案和解析
第一空:分数的表达方式:基数词-序数词(当基数词大于等于2时,序数词加s)
第二空:二十世纪九十年代
望采纳~