单词：block randomized experiment
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[ti:UNIT 4 Look into Science! Lesson 25: Let's Do an Experiment!] [0:00.466]UNIT 4 第四单元 [0:02.644]Lessons 25～32 第25~32课 [0:05.438]Look into Science! 观察科学！ [0:07.483]You Will Learn 你将学到 [0:08.630]Functions 实际应用
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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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A new study suggests that women who take fish oil supplements lower their risk of breast cancer. Fish oil supplements are a popular way to increase the intake of omega-3 fatty acids, which are thought to have a wide range of beneficial effects, parti
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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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