青黛的气味为（） ["气清香，味辛凉","气特异，味涩","无臭，味涩，苦，略回甜","微有草腥气，味淡"]
轨道斜巷中有水时，必须设置（），并保持水沟盖板齐全完好。 ["水泵","水沟","水槽","水仓"]
标示不明国籍或者中立国（地区）的队标用（）。 ["棕色","绿色","黄色"]
每条斜坡的下部车场人行道侧都应设置一个躲避硐室，其规格为：1.8m*1.4m*1.4m（高*宽*深），此硐室距起坡点不小于（）m。 ["2","3","2.5","5"]
The direction of prevailing winds in the Northern hemisphere is caused by the（）. ["Magnetic field at the North Pole","Gulf Stream","Earth's rotation","Arctic cold front"]
小型空分设备分馏塔加温时，为什么要对低压压力进行控制？
