篮球滚球大小球技巧

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物质是由分子构成,分子由原子构成,原子由带正电的原子核和围绕它的、带负电的电子构成。当在外部条 件作用下,外层电子摆脱原子核的束缚成为自由电子,物质就变成了由带正电的原子核和带负电的电子组成的离 子浆,因此我们将这种正负电荷总量相等的离子浆成为等离子。等离子广泛存在于宇宙中,被视为除去固、液、 气化,物质存在的第四态[1-7]


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