诱变剂的共性原则:
女,50岁,右肩痛2个月,右肩局限性压痛,外展外旋、后伸活动受限,诊断是()。 ["肩周炎","髌骨软化症","肱骨外上髁炎","颈椎病","桡骨茎突狭窄性腱鞘炎"]
淋巴细胞减低见于()。 ["A.风疹","B.严重化脓性感染","C.组织移植排斥反应","D.白血病","E.再生障碍性贫血"]
导致血沉加快的技术因素为()。 ["A.增加抗凝剂用量导致血液稀释","B.血沉管倾斜放置","C.纤维蛋白原增多","D.患者红细胞数目增加","E.红细胞直径过大"]
全身麻醉() ["术后即可进食","术后3~6小时可进食","术后2~3天可进食","肠道蠕动功能恢复后","呕吐反应消失后进食"]
公共产品的含义和特征是什么?