淋巴细胞是免疫活性细胞，以下哪种细胞不属于其中（） ["B细胞","T细胞","K细胞","NK细胞","单核巨噬细胞"] 在急性白血病中，最重要和具有诊断意义的病理改变是() ["A．外周血白细胞增多","B．骨髓幼稚白细胞增多","C．骨髓巨核细胞减少","D．肝内幼稚白细胞浸润","E．淋巴结肿大"] 风湿病患者，心尖部听诊闻及舒张期隆隆样杂音，首先考虑是() ["A．三尖瓣狭窄","B．主动脉瓣狭窄","C．肺动脉瓣狭窄","D．二尖瓣狭窄","E．二尖瓣关闭不全"] 正常脾脏结构的镜下观，请指出图中所示结构名称。C箭头所指为() ["A．白髓","B．红髓","C．脾窦","D．动脉周围淋巴鞘","E．脾小梁"] 正常脾脏结构的镜下观，请指出图中所示结构名称。B箭头所指为() ["A．白髓","B．红髓","C．脾窦","D．动脉周围淋巴鞘","E．脾小梁"] 女性病人，28岁。既往体健，近1年来出现乏力、气促、心悸，并逐步加重。查体：颈静脉怒张，两肺呼吸音粗，心音弱，心前区可闻Ⅱ级收缩期杂音，其诊断是()