检查胎儿肾成熟度的项目包括（） ["羊水泡沫试验","羊水肌酐测定","羊水吸光度测定","羊水葡萄糖测定","羊水卵磷脂/鞘磷脂测定"]
实施宰后检疫的官方兽医应在工作前每人准备（）套检验刀、钩和一根磨刀棒。 ["A、一","B、二","C、三","D、四"]
初期复苏时开放气道，畅通呼吸道的方法有（） ["仰面举颏法","仰面抬颈法","俯卧举颏法","俯卧抬颈法","托下颌法"]
截止阀同闸阀相比调节流量（） ["差","好","相同","不一定"]
对真性乳糜性积液与假性乳糜性积液鉴别有价值的是（） ["胆固醇测定","甘油三酯测定","脂蛋白电泳","醚试验","外观和浊度观察"]
前变速驱动桥等角速万向节磨损会引发（）故障现象。
