题目

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。Often, news reports on health and medicine can be confusing. Large newspapers, magazines, TV networks, and radio stations often have medical【1】（journalist） to cover developments in health and medicine. Their job is to report scientific information in a way that's easy for ordinary people【2】(understand). Many health stories are 【3】 (accuracy) and balanced. But not all are. Sometimes, a journalist tries to quickly change information to a short news story, and he/she may oversimplify the X＞2，且Y＞3是X+Y＞5，XY＞6成立的（　　）A．充分不必要条件B．必要不充分条件C．充要条件D．既不充分又不必要条件