内痔早期的典型症状是() ["痔块脱出","无痛性、间歇性便后出血","疼痛伴血便","肛门常有黏液分泌物","肛门瘙痒感"]
水痘的临床表现
对培训机构进行评估的指标主要包括()。 ["A、出勤率","B、培训率","C、使用率","D、变化率","E、合格率"]
诊断结肠癌最可靠的依据是() ["X线钡剂灌肠","血CEA检查","B超检查","CT检查","结肠镜并病理检查"]
教态是培训师的外在能力素养,主要评估的指标有()。 ["A、仪表","B、语言表达能力","C、表情","D、精力充沛小","E、创见"]
简述水痘的病因及流行病学