分析大学生社会直接成本有多种计量方法，比较常用的有匡算法和()。
时间：2020-06-08
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计量教育投资经济效益的前提条件是()。
确定教育投资比例的物质前提和客观依据是()。
The students in the class were _____four groups before they started the game.
“事以密成，语以泄败”说明信息的传递应
信息有一个信源及多个信宿，它体现的信息特征是
He’s got himself into a dangerous situation he is likely to be accused of meeting someone.
教育投资只有通过培养出来的劳动力以及再生产出来的科学技术进入生产领域，才能创造社会物质财富，说明教育投资具有()。
Along with the letter was his promise _____he would visit me this coming Christmas.
