句型转换
—I think it costs 15 and 20 dollars.
如右图所示，用悬挂着的乒乓球接触正在发声的音叉，乒乓球被弹开．这个实验是我们在学习《声现象》一章时经常做的实验，它说明了（ ）
The movie is very ____ (success) and many people like it.
