根据释义及首字母提示，完成下列单词。

1. c____   : quiet; not excited; not showing fear

2. p____   :favored by many people; well liked

3. v____   :opinion; idea

4. b____   :the two; the one and also the other

5. o____   ;facing; different

流通加工也是物流活动中的一项重要的增值服务，属于物流活动必不可少的项节之一。