waves include primary wave (P-wave) and secondary wave (S-wave) .

Seismic waves include P wave, S wave, Rayleigh wave and Love wave, of which the fastest is P wave.

Which of the followings indicates abnomal P-wave() A: P-wave is upright in lead Ⅱ B: P-wave is biphasic in lead Ⅲ. C: P-wave is inverted in lead av D: P-wave is not obvious in lead avVL E: P-wave is inverted in lead V5.

The Elastic waves include P-wave and S-wave.

In a ( ), the oscillations are perpendicular to the direction in which the wave travels. An example is a wave on a string. A: transverse wave B: longitudinal wave

What kind of wave does ultrasound belong to and has certain radiation? A: Electromagnetic wave B: Mechanical wave C: Particle wave D: Light wave

The sound wave is (). A: Mechanical transverse wave B: Mechanical longitudinal wave C: Electromagnetic wave D: X<br/>rays.

wave to/at sb wave goodbye to sb

驻波 standing wave；stationary wave

关于波面与波线About Wave Surface and Wave Line A: 波面处处与波线平行；The Wave Surface is parallel to the Wave Line everywhere; B: 波面处处与波线不一定平行；The Wave Surface is not always parallel to the Wave Line; C: 波面处处与波线垂直；The Wave Surface is everywhere perpendicular to the Wave Line; D: 波面处处与波线不一定垂直；The Wave Surface is not always perpendicular to the Wave Line;