单项选择题
A.red-and-white octagon B.daymark with a yellow stripe on it C.green square D.yellow diamond
A spanner is a （）.A.cross connection line between two m...
单项选择题A spanner is a （）.
A.cross connection line between two main fire lines B.special wrench for the couplings in a fire hose line C.tackle rigged to support a fire hose D.None of the above
A slow，gradual fall of the barometer indicates approach...
单项选择题A slow，gradual fall of the barometer indicates approaching（）.
A.gale force winds within 12 hours B.blizzard conditions C.deteriorating or unsettled weather D.heavy，wind driven rain
A slow rise in the barometric pressure forecasts（）.A.ra...
单项选择题A slow rise in the barometric pressure forecasts（）.
A.rainy weather for the next 48 hours B.high seas C.improving weather conditions D.deteriorating weather conditions
