单词：null hypotheses
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In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produc
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6. They would try to decide what intelligence in huamns is really for, not merely how much of it there is. 【分析】复合句。本句的主干是 They would try to decide...。decide 后跟两个并列的宾语从句，分别由 what 和 how much
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In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic
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27. Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of thi
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In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produc
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Grammar Girl here. Today I'm going to talk about on accident versus by accident and how language changes. Some of the most difficult questions I get are from non-native English speakers who want to know why we use a particular preposition in a specif
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考试日期： 2012 年 11 月 3 日 Reading Passage 1 Title: The dinosaurs footprints and extinction Question types: YES/NO/NOT GIVEN, Summary 文章内容回顾 文章从恐龙的脚印开始讲恐龙的灭绝。 英文原文阅读 Mass Extinction
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Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is
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