2017航海英语复习六
Key word 20: Humidity and Dew point（8）
B783.Humidity is known as the amount of in the air.
A. hydrogen B. moisture C. dust D. temperature
【知识点】湿度
【解析】湿度是指空气中水分的含量。
C750、Relative humidity is defined as __________
A. the maximum vapor content the air is capable of holding
B. the minimum vapor content the air is capable of holding
C. the ratio of the actual vapor content at the current temperature to the air’s vapor holding capability
D. the ratio of the moisture content of the air to barometric pressure
【知识点】相对湿度海盗的故事
【解析】相对湿度定义为特定温度下空气中实际水汽含量与饱和含量之间的比值。
相关题目
B751、________is the actual amount of water vapor in the air compared with the saturation amount of water vapor in the air at the same temperature and pressure, the figure is usually expresd as a percentage, with saturated air having a relative humidity of 100%.
A. dew point temperature B. relative humidity C. saturated humidity D. humidity
脸部穴位B716、Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at ______.
A. a specific barometric pressure B. a specific temperature
C. a specific wind speed D. any time
A682. The expression “the air is saturated” means __.
A. the relative humidity is 100%
B. the vapor pressure is at its minimum for the prevailing temperature
C. precipitation has commenced
D. cloud cover is 100%
【知识点】相对湿度
【解析】空气饱和是指相对湿度为100%。
D681.The dew point is reached when the ___
A. temperature of the air equals the temperature of the awater
B. atmospheric pressure is 14.7lbs. per square inch
C. relative humidity reaches 50%
D. air becomes saturated with water vapor
【知识点】露点
【解析】空气中水汽饱和时，刚好达到露点温度。（气压一定）
D664. As the temperature for a given mass of air increas, the ______.
A. dew point increas B. dew point decreas
C. relative humidity increas D. relative humidity decreas
【知识点】露点与相对湿度
【解析】给定气团的温度升高时，相对湿度减小。
D676. A heated bulkhead has the effect on a hygroscopic commodity of ______.80经典老歌
A. causing moisture to accumulate against the bulkhead
B. lowering the vapor pressure of the commodity
C. lowering the dew point of the air
D. raising the vapor pressure of the commodity
【知识点】货物照管——相对湿度与露点
【解析】hygroscopic commodity 吸湿性货物措施项目
Key word 21: Fog and visibility （9）
D649. The fog produced by warm moist air passing over a cold surface is called_____.孤的组词
A. conduction fog B. radiation fog C. frontal fog D. advection fog
【知识点】平流雾
怀孕吐血
好看的英文网名【解析】暖湿空气经过较冷的下垫面形成的雾是平流雾。
conduction 传导；radiation fog 辐射雾；frontal fog 锋面雾；advection fog 平流雾
相关题目
D720、The fog most commonly encountered at a is called _________
A. conduction fog B. radiation fog C. frontal fog D. advection fog
D633. Advection fog is most commonly caud by ______.
A. air being warmed above the dew point
B. saturation of cold air by rain
C. a rapid cooling of the air near the surface of the Earth at night
D. warm moist air being blown over a colder surface
B775. The passage of very cold air over much warmer water caus _________
A. frontal fog B. arctic a smoke C. advection fog D. radiation fog
【知识点】蒸汽雾
【解析】很冷的空气覆盖在暖海面上会形成“北冰洋蒸汽雾”。
寒冷稳定的空气覆盖在暖海面上，海面蒸发使贴近海面的空气达到饱和形成雾，称为蒸汽雾（steam fog）。多产生于极地冰原的边缘、冰间水面、亚洲和北美的东海岸。
D749、The degree of being en under certain weather condition is called _________
A. front B. depression C. swell D. visibility
【知识点】能见度
【解析】特定天气条件下的能见距离称为能见度。
B754、When visibility is 10 nautical miles, we say that visibility is ___________
A. very good B. good C. poor D. moderate
【知识点】能见度的等级
【解析】能见度为10海里，等级为良好。
相关题目
A160. During this ason each year, the visibility in the abovementioned area is ____.
A. poor B. small C. little D. trifle
A748. ______will reduce the visibility．
A.dust B．a water C建筑学学科评估．land sand D．Wind
B781.Visibility at a can not be affected by ．
A. Rain B. dark C. snow D. hail
Key word 22: Cloud （6）
A636. Cloud formations are minimal when the ______.
A. surface temperature and temperature aloft are equal
B. surface temperature and temperature aloft differ greatly
C. barometric pressure is very low
D. relative humidity is very high
