未知题型
A、纯金属热导率随温度升高而降低B、无机非金属材料以声子导热为主C、晶体结构越复杂，热导率越低......
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Directions: You are going to read a passage with 10 sta...
问答题Directions: You are going to read a passage with 10 statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Ecotourism: Traveling the world to help save it
下面有关维德曼?弗朗兹定律描述错误的是（）。
未知题型下面有关维德曼?弗朗兹定律描述错误的是（）。
A、 B、 C、 D、
单项选择题 A、 B、 C、 D、
