业主在工程项目准备阶段的主要内容不包括（）。

A．及时办理有关设计文件的审批工作

B．组织评审可行性研究报告

C．组织开展设备采购与工程施工招标及评标等工作

D．明确勘察设计的范围和设计深度

In our own galaxy, the Milky Way, there are perhaps 200 billion stars, a small part of them probably have planets on which life is feasible.

A．a small fraction in which

B．a small fraction of which

C．a small fraction which

D．which a fraction of