2. 外语
  3. A theory is an organized set of principles that is designed to explain and predict some phenomenon. Good theories also provide s

A theory is an organized set of principles that is designed to explain and predict some phenomenon. Good theories also provide s

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问题 A theory is an organized set of principles that is designed to explain and predict some phenomenon. Good theories also provide specific testable predictions, or______, about the relation between two or more variables.
选项 A、hypothesis
B、conception
C、idea
D、meaning
答案A
解析 在给出的选项中：hypothesis“假设”；conception“概念”；idea“想法”；meaning“意义”。根据常识可知，科学理论的建构常常是以假设为出发点的。所以，正确答案是A。
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