题目选项分析

By recording the noise of crinkled wrappers as they were slowly stretched out in an otherwise silent chamber, and then digitizing and analyzing the sound emissions on computers, a team of scientists found that the noise was not continuous but consisted of individual bursts or pops just thousandths of a second long.

By recording the noise of crinkled wrappers as they were slowly stretched out in an otherwise silent chamber, and then the sound emissions were digitized and analyzed on computers, a team of scientists found the noise not to be continuous but consisted of individual bursts or pops just thousandths of a second long.