A、<span style="font-size:14px;font-family:汉仪书宋二简">流体分子的热振动</span>
B、<span style="font-size:14px;font-family:汉仪书宋二简">流体体内电子的移动</span>
C、<span style="font-size:14px;font-family:汉仪书宋二简">流体质点的位移、扰动</span>
D、<span style="font-size:14px;font-family:汉仪书宋二简">晶格</span><span style="font-size:14px;font-family:汉仪书宋二简">振动</span>