sakinasarwari sakinasarwari

10-11-2022
Health

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Waves have peaks and troughs, and the wavelength is the distance between peaks. The frequency is the number of peaks that pass a reference point in a given time period.
Which two words would BEST replace "peaks" and "troughs" in the selection above?

A
crests; dips
B
centers; borders
C
movements; breaks
D
spikes; cribs

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