新闻发布会的主题是根据（）来确定的
A.公司政策
B.市场要求
C.事件性质
D.组织机构传播目标
参考答案：C, D
He __________ his position as the manager of the department because he was offered a better job.[ ]
A．regained
B．repeated
C．represented
D．resigned
我国耐腐蚀泵有（）型腐蚀泵和（）型液下泵两种。
