
【名词&注释】
医疗事故(medical malpractice)、献血者(blood donors)、青春期(puberty)、幼儿期(toddler age)、可摘局部义齿(removable partial denture)、学龄期(school age)、婴儿期(infancy)、自我意识发展(self-awareness development)、固位体(retainer)、个体自我意识(the self-awareness of individual)
[单选题]个体自我意识(the self-awareness of individual)发展(self-awareness development)的开始时期是( )
  A. 婴儿期(infancy) 
  B. 幼儿期 
  C. 学龄期 
  D. 青春期