关于声现象,下列说法正确的是()
A:声音在真空传播的速度最大
B:声源的振幅越大,音调越高
C:城市道路两侧的隔音墙是从噪声的产生环节控制噪声的
D:人能分辨出不同乐器发出的声音,主要根据它们发声的音色不同
下列植物中具有根、叶、茎的是( )
— There________a football match on TV tonight. I can't wait to watch it.
— Me, too. It's________ Guangdong team and the Australian team.
——A new museum in Shenyang in May.——Great! Let's go and visit it this summer.