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What was the role of the orchestra in an opera?

Atypical scale usually consists of one of pitches. 1. rhythm 2. octave 3. key 4. series

Choose the statement that best describes why textiles should not be exposed to ultraviolet rays a. ultraviolet rays fade the colors in the fabric b. ultraviolet rays will ignite the threads c. ultraviolet rays fade and weaken the fabric d. ultraviolet rays will weaken the fabric