是计量声音强度相当大小单位.分贝一下最适合人类生存.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 19:14:08
![是计量声音强度相当大小单位.分贝一下最适合人类生存.](/uploads/image/z/2383047-63-7.jpg?t=%E6%98%AF%E8%AE%A1%E9%87%8F%E5%A3%B0%E9%9F%B3%E5%BC%BA%E5%BA%A6%E7%9B%B8%E5%BD%93%E5%A4%A7%E5%B0%8F%E5%8D%95%E4%BD%8D.%E5%88%86%E8%B4%9D%E4%B8%80%E4%B8%8B%E6%9C%80%E9%80%82%E5%90%88%E4%BA%BA%E7%B1%BB%E7%94%9F%E5%AD%98.)
x[Yo[ɕ+D?ـIs_ !I@I72gY:A)ddJʒH%GY^>/;Td31FҺ{ٷ9u?-WQJu۪}얛OTk^136睝(;v۽츫uD}Ouw{ޕ.َ$٫xB>Jas{49aw[u
v +ls6ۣaoGglFm Hν»6G[g'ްLW 9lU!Vhw'^75~!qL4^B{]Nt^mz+KSe\?P!Ό7R6@wv퉄-] qtf݇Ԡ_7x5zQQ+g{x^{?|H yo~/z-|RV0oQިKX"R_;(glE-3՛ja{Xl7:]4V Ŋl!&3{z '/?Z}gJg08lcq3k=_IDi/UgDnOA罙mF#kL:1v< R徳w9uW;ןRK-RUKw{@_E
Jlz-T@%XZAv$bAtjBF:5te:-$5_W[nd&9"_ (6 Du/-oіF)ڄkg@vO~N|ujZUA珟GZaL=eoLګ`*_S?$vuPml:B
dYկi9.HmA/!D7lX.>aDd[as*m>"EY`|{@CHI2S95C
:ϳigok{:p.ک'SJm 7XacGpè"qkTxzj4X$,B&OLLTK:h頀Cdi\#, 8<,qK m?Ñ^6uɢ@L
y%rR>)@7DDՁNPO۰%RQ%UPz(#-e/Kb#~ݎz@NHxlYSǁ4B['߷uA\Q#/- &ޞ[9MhuAL^4vV 7I*+ZV| NR`[4dpaHoɴZoh \@ۈhXLnyH^ӺZKdA#9!ɝàW93t=#z>XG6s^ՏX@1UkO?gGtuOt
KAŏW)dl~ p[M9tSe%j!Ҵ{R|4glqKi
6qTy,0*4ȳ|Pu1+ym#G"ĉ`\
[|Qf\>~
tw?)Fe@M