单词：within-subject experiment
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unit 160 工作建议（2） dialogue 英语情景对话 A:Where can find information on this subject? A:哪里能找到关于这个课题的资料？ B:I'm not sure. Let's look up the catalogue. B:我不太清楚，还是查一下目录吧。 A:Will
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It's always fun when my brother comes to visit from New Zealand. Because he is a math and science teacher, he often thinks of interesting things to do that fascinate the children. When he heard that one of my sons does experiments in the kitchen for
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Sidney was a 14-year-old boy with an interest in the sciences. One summer day he started his own investigations. With his 12-year-old sister Sophie in tow, he caught a large bull frog in a local pond. Sidney started his experiment with the amphibian,
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EDUCATION REPORT - Duke iPod Experiment By Nancy Steinbach Broadcast: Thursday, August 05, 2004 This is Steve Ember with the VOA Special English Education Report. Duke University in Durham, North Caro
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