standards

北京市预防接种工作技术规范 : Technical Standards on Immunization program in Beijing.pdf

本书阐述了脊髓灰质炎、麻疹、风疹、流行性腮腺炎、白喉、百日咳、新生儿破伤风、流行性脑脊髓膜炎、流行性乙型脑炎、水痘、人狂犬病、甲型病毒性肝炎、乙型病毒性肝炎13种疫苗针对传染病的监测技术与方法;介绍了疫苗、冷链系统、常规免疫接种、预防接种不良反应、免疫效果与疫苗滴度等方面的管理规

Passage 3Questions 11 to 15 are based on the following passage.  The word science is heard so often in modern times that almost everybody has some notion of its meaning. On the other hand, its definition is difficult for many people. (79) The meaning of t

Passage 3Questions 11 to 15 are based on the following passage.  The word science is heard so often in modern times that almost everybody has some notion of its meaning. On the other hand, its definit