Examlex
Since the cost of obtaining more of any resource is __________,viewing any resource's price as zero leads to __________.
Tilting Head
An action where the head is inclined to one side, often indicating interest, curiosity, or attentiveness.
Higher-Frequency
Refers to waves or signals with a greater number of cycles per second, often related to electromagnetic spectrums or sound.
Piano Notes
Musical sounds produced by the keys of a piano, each representing a different pitch.
Sound Waves
Vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.
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