单项选择题Duty was a powerful guiding ________ in her life, and in her view, Edward VIII had avoided it. A、education B、demonstration C、compliment D、concept
单项选择题32岁女性，计划外妊娠，向护士咨询药流知识。可用药物流产的最大妊娠周数是 A.5周B.6周C.7周D.8周E.9周
