Some experts say its pleasant but lazy summer break, which took hold in the early 20th century, is one of the reasons math skills and graduation rates of U . S . high schoolers ranked well below average in two international education reports published in 2007 .

  • 一些专家说,20世纪初开始在美国实行的愉快而慵懒的暑假制度是导致美国高中生的数学技能和毕业率在2007年两份国际教育报告中远远低于平均水平的原因之一。

  • 高考真题- 2018 浙江 阅读B 2025-01-20 13:21:45

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