某水泥厂进口大型球磨机一台,安装时发现此设备存在质量问题,应由( )来组织鉴定小组检验。
A.
B.
C.
参考答案:C
With the machine ____, she couldn't keep her eyes ___ in bed.
A.burning, closed
B.burnt, close
C.to burn, closed
D.being burnt, close
胃气钡双重造影时钡剂的浓度最好是()
A.50%~100%W/V
B.100%~150%W/V
C.150%~200%W/V
D.200%~250%W/V
E.250%~300%W/V