The Great Wave Pavilion, the Lion Grove Garden, the Humble Administrator's Garden, and the Lingering Garden are regarded as the“four great gardens in ______". A: Suzhou B: Nanjing C: Beijing D: Chengde

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

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

____: n. the rate at which a sound wave, light wave, or radio wave moves up and down 震动频率

is the main cause of four-wave mixing. A: Wavelength division multiplexing B: Long-distance transmission C: Zero dispersion D: Phase matching