I don't know管乐器的发声原理是管内空气拄的振动,当室内温度升高时管乐器的音调( ).A.变高 B.变低 C.没有影响答：A

I don't know管乐器的发声原理是管内空气拄的振动,当室内温度升高时管乐器的音调( ).A.变高 B.变低 C.没有影响答：A 打击乐器,弦乐器,管乐器的发声原理,即使怎么敢变音调和响度的? 管乐器是靠什么发声的 管乐器是通过管内( )的( )发声 I don't know. 管乐器如何发声 I don't know?的同义句 “i don't know you know i don't know 管乐器是怎样的发声的,怎样改变音调的? 弦乐器和管乐器发声的音调分别与哪些因素有关? I really don't know her和I don't really know her的区别 I don't know anything 和 I don't know nothing的区别 sorry,I don't know. i don`t know much I don't really know. 英语；I don't know I don't know miss I don't know him.