理想气体分子是没有相互作用，分子不占有体积和没有质量的质点。
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4．石料SiO2含量越高，其酸性越强，与沥青的粘附性越好。
ArtistShare started as a website where musicians could seek donations from their rivals.
当代资本主义发生了一些新变化并没有改变资本主义制度的本质
A bottleneck is a situation that helps a process or activity to process.
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