在网络协议的三个基本要素中，（）是用于协调和进行差错处理的控制信息。
A.语义
B.差错控制
C.协议
D.协同控制
参考答案：A
根据句意用所给动词的适当形式填空。
1. We all know that a year (divide) into four seasons.
2. "Hero" is an ancient (古代的) costume film___________ (direct) by Zhang Yimou.
3. China succeeded in ___________ (send) up Shengzhou Ⅵ spaceship on October 12,2005.
4. They (quarrel) with each other last night.
5. Kids don't know how (achieve) a balance between work and play.
放款时的工作流如下：客户经理-放款复核员-（）-放款中心主管。
A、放款审核员
B、行长
C、国际业务审核员
D、资金管理员
