— Bill, can I get you anything to drink?
— Thanks.
A:You are welcome.
B:It doesn't matter.
C:No problem.
D:I wouldn't mind a coffee.
从爵士乐形成和发展的历史中,人们可以悟出什么道理?
下图为“大洋洋流模式图”。读图完成下列各题。