（本题满分6分）九年级某班组织班团活动，班委会准备买一些奖品.班长王倩拿15元钱去商店全部用来购买钢笔和笔记本两种奖品，已知钢笔2元／支，笔记本1元／本，且每样东西至少买一件.

⑴有多少种购买方案？请列举所有可能的结果；

⑵从上述方案中任选一种方案购买，求买到的钢笔与笔记本数量相等的概率.

Project Time Management includes the processes required to manage timely completion of the project, these processes interact with each other．______is following the process-Estimate Activity Durations．

A．Develop Schedule

B．Estimate Activity Resources

C．Define Activities

D．Sequence Activities