从自然经济向商品经济发展的初期,证券市场就形成了。()
属于活疫苗的是()。 ["卡介苗、百日咳","卡介苗、麻疹疫苗","麻疹疫苗、脊髓灰质炎疫苗","脊髓灰质炎疫苗、乙型脑炎疫苗","乙型脑炎疫苗、狂犬病疫苗"]
引起氟牙症的水源中含氟浓度是() ["A.超过2ppm","B.低于1ppm,超过0.5ppm","C.超过1ppm,小于2.0ppm","D.超过0.2ppm,小于0.5ppm","E.超过0.1ppm,小于0.5ppm"]
身体灼热,神昏谵语,舌謇肢厥,舌色鲜绛,脉细数,辨证为() ["热灼营阴证","热陷心包证","湿蒙心包证","热盛迫血证","热盛动风证"]
CEA的抗原决定簇中具有较高特异性的是() ["Gold2~4","Gold1~3","Gold3~4","Gold4~5","Gold2、Gold4"]
注意力缺陷多动症