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6 天
暂停对外援助、发起中美外长通话、主持QUAD外长会:鲁比奥的开篇外交
在正式上任不到一周的时间里,鲁比奥下出了一系列外交先手棋,与日、印、澳三国外长举行会议;隔天与菲律宾外长通话;又先后与以色列总理、外长通话;24日,美方发起中美外长通话。
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11 天
为什么两个原子轨道会形成两个分子轨道,比如两个1s正向叠加和 ...
要搞清楚这个问题,首先要明确要求解什么问题。 咱就从最简单的氢分子说起。由于原子核比电子质量大1836倍,可近似看成质点,用牛顿力学描述。 求解氢分子系统的薛定谔方程,就只需考虑电子。这样,系统的哈密顿量就是: \begin{aligned} ...
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