【单选题】When you are worried about whether you are actually measuring what you think you are measuring, you are worried about __________.
【单选题】When you are worried about whether you will get the same results if you repeat your experiment again in the future, you are worried about _________.
【单选题】下列不属于医疗事故的是
B.
病人在加压输液时无人守护,致病人发生空气栓塞而死亡
C.
护士严格询问过敏史和家族史后进行青霉素皮试,病人在试验后突然死亡
D.
护士未严格按输血规程给病人输血,但病人在输血后二周查出有丙型肝炎
E.
护士执业肌肉注射时因消毒不严格导致病人注射局部深度脓肿
【判断题】中国共产主义青年团团旗为长方形,它的长与高之比为1:0.618。