A. 颌下三角、颏下三角、下颌后窝、颈动脉三角、肩胛舌骨肌气管三角
B. B.颌下三角、颌后三角、颈动脉三角、颏下三角、肩胛舌骨肌气管三角
C. C.颌下三角、肩胛舌骨肌气管三角、颏下三角、颈动脉三角及颌后三角
D. D.颌下三角、肩胛舌骨肌气管三角、颈动脉三角、颏下三角及气管三角
E. E.颌下三角、颏下三角、颈动脉三角、颌后三角及气管三角
颈前三角包括
A、颌下三角、颏下三角、下颌后窝、颈动脉三角、肩胛舌骨肌气管三角
B、颌下三角、颌后三角、颈动脉三角、颏下三角、肩胛舌骨肌气管三角
C、颌下三角、肩胛舌骨肌气管三角、颏下三角、颈动脉三角及颌后三角
D、颌下三角、肩胛舌骨肌气管三角、颈动脉三角、颏下三角及气管三角
E、颌下三角、颏下三角、颈动脉三角、颌后三角及气管三角
词汇和段落翻译 (1)傅里叶级数(2)Trigonometric expansion of Fourier series (3)discrete spectrum (4)幅频谱(5)Phase spectrum (6)Complex exponential function expansion of Fourier series (7)Most complex dynamic mechanical signals may be decomposed into a combination of simple harmonic components,whether the signals are steady-state or transient. Those dynamic signals can be pressure, displacement, strain, or something else. If the original signal is taken apart into frequency components, each component will have its own amplitude and frequency. It will have various phase relations with the other frequency components. A general mathematical statement of dynamic mechanical signals may be written as follows, and this is the well known Fourier transformation process actually. In the formula, An and Bn =amplitude constants called harmonic coefficients. n is called harmonic orders.
下列哪一三角属颈后三角区 ()
A、颌下三角
B、颈动脉三角
C、肌三角
D、锁骨上三角
E、颏下三角
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