According to the passage, which of the following statements is true?【小站备考】

The phonograph cylinder was a remarkable invention that allowed sounds to be recorded and reproduced--the earliest instrument to do both (édouard--Léon Scott de Martinville created a phonautograph that could record sound in a visible format, but could not play it back). First invented by Thomas Edison in 1877, the phonograph cylinder was wrapped in a scratchable medium and then rotated under a stylus that was attached to the speaking tube. When sound entered the tube, the attached diaphragm would vibrate, causing the point of the stylus to create indentations of varying depths; meanwhile, the cylinder was rotated by a hand crank at a rate of 60 revolutions per minute. The cylinder could then be played back by drawing a lighter stylus along the indentations that caused the diaphragm of a second tube, the speaking tube, to vibrate, replicating the recorded sounds. Over time, the phonograph slowly evolved. Cylinders were wrapped in wax instead of with tin foil, a motorized crank and more effective recording media were developed, and the cylinder itself was replaced with a disc that allowed for more durable creations. These evolved into record players as we know them.

Question 19

According to the passage, which of the following statements is true?

Question 19

According to the passage, which of the following statements is true?

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