当金属温度()蒸汽的饱和温度时热量以凝结放热方式传递给金属表面。 ["A、高于","B、低于","C、等于"]
氨气用酚酞试纸检查呈() ["A、玫瑰红","B、鲜艳红"]
“选项”命令是在下面哪个下拉菜单中?() ["“文件”下拉菜单","“视图”下拉菜单","“窗口“下拉菜单","“工具“下拉菜单"]
BHT是()的缩写 ["A、丁基羟基茴香醚;","B、生育酚;","C、二丁基羟基甲苯;","D、没食子酸丙酯。"]
若大气压力为0.1MPa,容器内的压力比大气压力低0.004MPa,则容器内的()。 ["表压力为0.096MPa","绝对压力为0.096MPa","真空度为0.104MPa","表压力为0.104MPa"]
抽提系统开工分几大步骤?