—How do you find your new classmates?

—Most of them are kind. But _________ is so good to me as Bruce.

A．none

B．no one

C．every one

D．some one

下面哪些项目是供应链管理中的关键问题（）。

A.网络配置

B.库存控制

C.供应合同

D.配送策略

E.优先原则