在细胞免疫中,效应T细胞发挥免疫作用的机制是() ["A.激活靶细胞内的溶酶体酶","B.与抗原结合使其失去活性","C.直接吞噬靶细胞将其分解","D.将抗原呈递给B淋巴细胞"]
股环的内缘是() ["腔隙韧带","股静脉","耻骨梳韧带","腹股沟韧带","腹部深筋膜"]
患者,女,75岁,股骨颈骨折,GardenⅣ型,首选的治疗方法是() ["人工髋关节置换","加压空心钉内固定","人工股骨头置换术","三翼钉内固定术","保守治疗"]
仓泵不加压与气源压力低无关。()
增强肌力的最佳方法是() ["等长收缩","等张收缩","等速练习","主动运动","低频电刺激"]
我国荒漠地区的地带性土壤主要有()、()、()三种。