1 2 uupigyu318 It is unrealistic to expect individual nations to make, independently, the sacrifices necessary to conserve energy. International leadership and worldwide cooperation are essential if we expect to protect the world’s energy resources for future generations 12.27作者: ipod 时间: 2010-12-29 15:36
1 joly516 the best teachers are those who let their students challenge ideas instead accept ideas. 12.27作者: ipod 时间: 2010-12-29 15:36
1 s1001l Physical activity and sports are as important as a student's education of academic. 12.27
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