题目内容
人耳可以感受到声压随时间的瞬时变化p（t）。
查看答案
搜索结果不匹配？点我反馈
更多问题
在常温常压下，可以用测量的声压级代表声强级。
老师上课讲课的声音大约是150dB。
On August 12, 1940 General Headquarter of German Air Force started to implement “”, thus the beginning of the British campaign.
The Battle of Britain marked the first defeat of Hitler's military forces, with air superiority seen as the key to victory.
微信支付 
支付宝支付