单项选择题
女性,16岁。6个月来左小腿上段肿胀疼痛,近1个月肿胀明显,以夜间痛为著。查体:左小腿上段肿胀,浅静脉怒张,压...
单项选择题女性,16岁。6个月来左小腿上段肿胀疼痛,近1个月肿胀明显,以夜间痛为著。查体:左小腿上段肿胀,浅静脉怒张,压痛明显,触及一直径约6cm左右肿块,质硬,固定,边界不清。X线检查示左胫骨上端呈虫蚀状溶骨性破坏,骨膜反应明显,可见Codman三角。最可能的诊断是( )。
在施工现场专用变压器的供电的TN-s接零保护系统中,电气设备的金属外壳( )与保护零线连接。保护零线应由工作接...
单项选择题在施工现场专用变压器的供电的TN-s接零保护系统中,电气设备的金属外壳( )与保护零线连接。保护零线应由工作接地线、配电室(总配电箱)电源侧零线或总漏电保护器电源侧零线处引出。
Which statement about flood is TRUE? A、The flood is por...
单项选择题Which statement about flood is TRUE? A、The flood is portrayed as an instrument of punishment for human transgression in the Bible. B、 In Yu’s story, the flood is described as a natural phenomenon. C、Different roles of flood contributed to different themes in these two stories. D、All of the above