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对于理想气体系统来说，在下列过程中，哪个过程系统所吸收的热量、内能的增加量和对外作的功三者为负值？（）
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气体分子的平均平动动能只与温度有关。（）
Both Walt Whitman and Emily Dickinson are accredited Romantic poets during the first half of the 19thcentury in the United States, yet they are contrasting in various ways. Please compare the two poets. You may want to talk about their life experiences, their stylistic features as well as their poetic qualities, and of course, many other aspects. You should write an essay entitled “A Comparative Review of Walt Whitman and Emily Dickinson” in no less than 200 English words.
相干波的条件是振动频率相等、相位差恒定以及
在双缝干涉实验中，两条缝的宽度原来是相等的。若其中一缝的宽度略变窄(缝中心位置不变)，则
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