UID:30884
UID:34451
UID:64224
UID:85404
UID:22040
UID:43090
UID:75675
UID:29302
UID:4407
UID:23407
UID:36449
UID:69971
UID:83645
UID:69030
UID:44898
引用第16楼误讲得于2012-09-30 14:59发表的 :响声越大阻力越大能量损耗越大