大肠杆菌在医学上有何意义?
关节活动度检查的禁忌证是() ["A．肌肉伤病及手术后 ","B．骨关节伤病及手术后 ","C．关节急性炎症期 ","D．关节内骨折未处理 ","E．神经系统疾患"]
“IV-DSA”插管，通常选() ["A．锁骨下静脉 ","B．肘正中静脉或贵要静脉 ","C．股静脉 ","D．大隐静脉 ","E．小隐静脉"]
内毒素与外毒素有何主要区别?
行穿刺插管的器械不包括下列哪项() ["A．穿刺针","B．导管","C．导丝","D．连接管","E．导管鞘"]
主要病原性球菌有哪些?
