一道物理题,求英语能人sound is a pressure wave that consists of compressions and rarefactions.Explain constructive interference of two sound waves in terms of pressure variations这题不是这么高深的问题啊。还是因为语言问题

一道物理题,求英语能人sound is a pressure wave that consists of compressions and rarefactions.Explain constructive interference of two sound waves in terms of pressure variations这题不是这么高深的问题啊。还是因为语言问题 求英语写作文能人解答? 求能人! 求一道物理题 一道物理题,求思路 求问一道物理题 一道物理题,求思路 求一道物理题详解? 求解决一道物理题 求一道物理题、、、、初三 一道物理题,求理由! 一道物理题,求原因! 一道物理题求详解 求一道物理题 一道物理题求详解 一道美国大一声学的物理题挺基础的 For a speaker whose sound power output is 140 dB,the distance from the speaker at which the sound level will be reduced to 96 dB is ___m. 一道物理题!求大神进 物理题一道,求画图方法