问题
单项选择题
在评价预防接种的效果时,下列哪个指标是评价流行病学效果的指标()
A.患病率
B.发病率
C.病死率
D.保护率
E.阳性率
答案
参考答案:D
在评价预防接种的效果时,下列哪个指标是评价流行病学效果的指标()
A.患病率
B.发病率
C.病死率
D.保护率
E.阳性率
参考答案:D
据调查显示,目前许多中学生不重视课外阅读。请你根据下表内容写一篇短文,对这一现状进行分析并提出建议。 要点:
2. 内容必须包括上表中的要点,可适当发挥; 3. 条理清楚、语句连贯; 4. 文中不得出现真实的地名、校名和人名。 At present only a few students do some reading after class. Here are several reasons. _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ ______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ |