影响X线照片对比度的最主要因素是() ["毫安值","千伏值","焦-片距","物片距","曝光时间"]
现浇混凝土及钢筋混凝土模板工程量,应区别模板的不同材质,按混凝土与模板接触面的面积,以平方米计算。()
旋毛虫病的首选治疗药物是() ["丙硫咪唑","甲苯达唑","乙胺嗪","噻嘧啶","左旋咪唑"]
3岁男孩,胸骨左缘第3~4肋间闻及收缩期杂音,心脏摄片显示右心室和左心室增大,肺血增多。该患者应考虑为() ["房间隔缺损","室间隔缺损","动脉导管未闭","肺动脉狭窄","法洛四联症"]
重症肌无力危象抢救的关键是()。 ["积极控制感染","肌内注射新斯的明","给予免疫抑制剂","辅助通气","去除使病情加重的诱因"]
什么是钢的微合金化?