Air temperature varies with ______.
A.the altitude above sea level
B.the season of the year
C.the latitude or distance from the equator
D.All of the above
______ is a type of fog occurring close to the sea surface when the air is dry and cold-probably at least 9℃ below the sea surface temperature．A.MIXING FOGB.ADVECTION FOGC.RADIATION FOGD.ARCTIC SEA SMOKE
点击查看答案
单选题An emergency sea anchor may be constructed by using（）.A a boat bucketB an air tank filled with waterC an oar and canvas weighted downD All of the above
单选题Air temperature varies with（）.A the altitude above sea levelB the season of the yearC the latitude or distance from the equatorD All of the above
单选题The dew point of air is reached when the wet bulb temperature is （）.A Twice the dry bulb temperatureB 10℃ above the dry bulb temperatureC 5℃ above the dry bulb temperatureD Equal to the dry bulb temperature
单选题If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to （）.A an overfilled expansion tankB excess chromate treatment of the jacket waterC a clogged raw water sea suctionD cavitation erosion of the heat exchanger tubes
单选题In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）A fuel must be preheatedB intake air should be preheatedC lube oil outlet temperature should be increased 20℃ above normalD none of the above
单选题The error in the measurement of the altitude of a celestial body，caused by refraction，increases as the（）.A horizontal parallax decreasesB observer's height above sea level increasesC humidity of the atmosphere decreasesD altitude of the body decreases
