土壤水分状况(Soil moisture regimes)
土壤水分状况(Soil moisture regimes)
相关考题：
Earthworms occur () adequate moisture and food and the necessary soil conditions are found. A.andB.howeverC.butD.wherever
According to the text．which of the following is NOT true?A．Soil forms from weathered rock on the earth surface．B．The deeper layer of soil is darker in colour than t}le surface soil．C．Air pollution is partially responsible for acid soil．D．Groundwater tends to carry away nutrients for plant growth．
According to the text. which of the following is NOT true?A. Soil forms from weathered rock on the earth surface.B. The deeper layer of soil is darker in colour than the surface soil.C. Air pollution is partially responsible for acid soil.D. Groundwater tends to carry away nutrients for plant growth.
A hygroscopic cargo is defined as a cargo ______．A.capable of absorbing moisture in the form of a gasB.capable of giving off moisture in the form of a liquidC.that is shipped in a liquid stateD.that will ignite in contact with water
The moisture equilibrium chart can be used to determine the ______．A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium existsB.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodityC.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargoD.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo
单选题Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture is present in the system, the indicator will （）Aactivate the driersBchange colorCsecure the compressorDadd a predetermined amount of liquid drier
单选题If the moisture content of the cargo sample is（）the Transportable Moisture Limit,then the cargo should be safe to load.AaboveBbelowCequal toDuncertain
单选题Clouds form（）.Aas a mass of warm，humid air rises into the atmosphere and cools，condensing moisture into small dropletsBas winds blow across bodies of water，the sun causes the moisture to be absorbed and move upward forming cloudsCdry air compresses moisture from the atmosphere into cloudsDwhen the relative humidity of the atmosphere is low
单选题The moisture equilibrium chart can be used to determine the（）.AAbsolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium existsBDew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodityCEnthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargoDTemperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo
单选题The ratio of the weight of moisture contained in a given volume of air, to the weight of moisture that the same sample would hold if saturated, is called the（）.Aabsolute humidityBrelative humidityCspecific humidityDtotal humidity
单选题The amount of moisture in a given sample of air, when compared with the amount of moisture the air could hold if totally saturated at the existing temperature of the sample, is called （）.Aabsolute humidityBspecific humidityCeffective humidityDrelative humidity
单选题Hot air can hold（）.Aless moisture than cold airBmore moisture than cold airCthe same amount of moisture as cold airDmoisture independent of air temperature
单选题ATo transport water to high places.BTo provide air conditioning.CTo fertilize the soil.DTo adjust the soil temperature.