周岁以内婴儿疟原虫率常代表缺乏免疫力人群罹患疟疾的机率,因而婴儿新感染率就成为疟疾传播频度的指征。
参考答案:对
根据中文提示,填入单词的适当形式。
小题1:This station ______________(广播) round the clock in six languages.
小题2:Despite a lot of ________________ (准备) , we didn’t win the contest.
小题3:The river flows very fast here, and bathing is ______________ (禁止).
小题4:Train services are back to _______________ (正常) again after the strike.
小题5:The first impression really _____________ (重要) in the job interview.
第一个发现病毒的人是()
A、列文虎克
B、罗伯特虎克
C、贝杰林克
D、adolf mayer