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1·Basing on mode analyse, I make harmonic analysis and take breadth-frequency curve of fan-out nodal to back cover board nodal.

在模态分析的基础上，对三种结构的振子进行谐响应分析。

2·Conclusion: Diltiazem depresses human atrioventricular nodal function in frequency-dependent manner, these effects lead to highly selective depression of AV nodal function during tachycardias.

结论：地尔硫对人体房室结功能影响具有快频率依赖性特点，这种作用使其在心动过速时选择性抑制房室结。