防火板剩余厚度不小于（）。 ["0.5mm","1mm","1.5mm","2mm"]
锅炉汽包水位的测量，使用最广泛的是（）水位计。
There were many people present and he appeared only for a few seconds, so I only caught a （）of him. ["glance","glimpse","look","sight"]
食品添加剂的标签、说明书应当载明名称、规格、净含量、生产日期等《食品安全法》规定的事项，以及食品添加剂的使用范围、用量、使用方法，并在说明书上载明“食品添加剂”字样。
中梁下盖板腐蚀深度不大于（）。 ["20%","30%","40%","50%"]
井下排水设备主要有哪些？
