传染病预防中针对传播途径的措施是()
A.隔离、留验、医学观察、应急接种等
B.预防接种、药物预防、个人防护
C.疾病监测
D.三级预防
E.消毒、杀虫
参考答案:E
修复开始前需要进行的口腔检查是 ()
A.口腔外部检查
B.口腔内部检查
C.X线检查
D.制取模型检查
E.以上内容都包括
All the students in this school are required to________at least two lectures on how to study every month.[ ]
A. attend
B. take part in
C. join in
D. go in for