- Do you know ____ girl with long curly hair?
- Yes. She is Mary. She plays ____ piano very well.
A:a; /
B:the; /
C:the; the
D:a; the
如图所示,为在不同情况下墨水滴入水中后出现的扩散现象.墨水滴入水中发生此现象,说明____ ,同时也可以推理知,物体的内能和____ 有关.