用分光光度法测定酒花的总苦味质,其使用的萃取试剂为()。
A、异辛烷
B、乙醚
C、氯仿
D、石油醚
参考答案:C
The nurse is assessing a 15-year-old female who is being admitted for treatment of anorexia nervosa. Which of the following clinical manifestation is the nurse most likely to find from the client
A.Tachycardia.
B.Coarse hair growth.
C.Parotid gland tenderness.
D.Warm, flushed extremities.
关于队列研究,下列哪项是错误的()。
A.研究的暴露是人为给予的
B.不适用于罕见病
C.设立对照组
D.因果时间顺序合理
E.可以了解疾病的自然史