( ) is an EC model in which a business provides some product or service to a client business that maintains its own customers. Page Reference: 8 AACSB: Use of information technology(65)
【简答题】Mary has a lot of hobbies. She usually gets up early so she can run before work. She doesn't often have time to skate, but she sometimes goes on Saturdays during the winter. Mary often rides a horse n...