Which statements are true about sinusoidal waveforms?
A) A sinusoidal waveform has no fundamental frequency
B) Sinusoidal waveforms do not repeat
C) A sinusoidal waveform does not contain harmonics
D) They are a composite of fundamental and harmonic frequencies
C
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____________________ is a metal that remains in a liquid state at room temperature.
Fill in the blank(s) with the appropriate word(s).