厨房里的下列变化属于化学变化的是( )
A:菜刀生锈
B:瓷碗破碎
C:水蒸发
D:西瓜榨汁
我国现行人民币有金属币和纸币两种。世界上最早的纸币是我国( )
We have classes from Monday to F____ .
My sister enjoys l____ to pop music.
I’m s____ for taking your pen by mistake.
The little boy cried s____ when his best friend moved to another city.
Lily has a good h____ of reading English stories every day.
如图所示,将一支点燃的蜡烛放在扬声器的前方,当扬声器发出较强的声音时,可以看到烛焰随着音乐的节奏晃动.扬声器的纸盆由于 ____发出声音,声音通过 ____传到烛焰处,烛焰的晃动说明声音具有 ____