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单选题
A weather forecast states that the wind will commence backing. In the Northern Hemisphere，this would indicate that it will（）.
A
shift in a clockwise manner
B
shift in a counterclockwise manner
C
continue blowing from the same direction
D
decrease in velocity
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更多 “单选题A weather forecast states that the wind will commence backing. In the Northern Hemisphere，this would indicate that it will（）.A shift in a clockwise mannerB shift in a counterclockwise mannerC continue blowing from the same directionD decrease in velocity” 相关考题
考题
Now satellites are 36 to forecast（预报）the weather. They are in space, and they can 37 any part of the world. The satellites take pictures of the atmosphere（大气），38 this is where the weather forms（形成）. They send these 39 to the weather stations. So meteorologists（气象学家）can see the weather of any part of the world. From the pictures, the scientists can often say 40 the weather will change.Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures, the meteorologists compare them with earlier 41 . Perhaps they may find that the clouds have changed during the last few hours. This may mean that the 42 on the ground may soon change, too. In their next weather forecast, the meteorologists can say this.So the weather satellites are a great 43 to the meteorologists. 44 __satellites were invented, the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for three or five days. Soon, perhaps, they may 45 forecast the weather for a week or more ahead（提前）.36.________________A. help B. to help C. helped D. helping
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This forecast states that winds will______.A. slow down at nightB. be from south to eastC. bring heavy rain on SundayD. be from different directions
考题
—_______. —About 25℃.A.The temperature may be higher.B.How is the weather today?C.What’s the temperature today?D.What is the weather forecast say?
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A、listensB、is listeningC、has listenedD、has been listening
考题
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考题
根据下列材料请回答 31～35 题：ANow satellites are helping to forecast the weather．They are in space，and they can reach any part of the world．The satellites take pictures of the atmosphere(大气)，because this is where the weather form．They send these pictures to the weather stations．So meteorologists(气象学家)can see the weather of any part of the world．From the pictures，the scientists can often say how the weather will change．Today，nearly five hundred weather stations in sixty countries receive satellite pictures．When they receive new pictures，the meteorologists compare them with earlier ones．Perhaps they may find that the clouds have changed during the last few hours．This may mean that the weather on the ground may soon change，too．In their next weather forecast，the meteorologists can say this．So the weather satellites are a great help to the meteorologists．Before satellites were invented，the scientists could forecast the weather for about 24 0r 48 hours．Now they can make good forecasts for three or five days．Soon，perhaps，they may be able to forecast the weather for a week or more ahead．第 31 题 Satellites travel______．A．in spaceB．in the atmosphereC．above the groundD．above space
考题
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考题
Maybe we’ll soon be able to forecast the weather fo______．A．one dayB．two daysC．five daysD．seven days or even longer
考题
When recording the wind direction in the weather log，you would report the ______．A.direction the wind is blowing towardB.direction the wind is blowing fromC.duration of the maximum gust of windD.wind chill factor
考题
A weather forecast states that the wind will commence backing. In the Northern Hemisphere this would indicate that it will ______.A.shift in a clockwise mannerB.shift in a counterclockwise mannerC.continue blowing from the same directionD.decrease in velocity
考题
By plotting the analysis messages on weather charts, we are able to ______.A.prevent any possible accident at seaB.prepare a reasonable forecast of the wind and weatherC.help the mariner to fix a accurate ship’s positionD.aid the salvage of a ship in peril
考题
If a sailing vessel with the wind on the port side sees a sailing vessel to windward and cannot tell weather the other vessel has the wind on the port or starboard side, she shall ______.A.hold course and speedB.sound the danger signalC.keep out of the way of the other vesselD.turn to port and come into the wind
考题
Little or no change in the barometric reading over a twelve hour period indicates ______.A.stormy weather is imminentB.that present weather conditions will continueC.a defect in the barometerD.increasing wind strength
考题
共用题干
第一篇Forecasting MethodsThere are several different methods that can be used to create a forecast. The method a forecaster chooses depends upon the experience of the forecaster,the amount of information available to the forecaster,the level of difficulty that the forecast situation presents,and the degree of accuracy or confidence needed in the forecast.The first of these methods is the persistence method,the simplest way of producing a forecast.The per- sistence method assumes that the conditions at the time of the forecast will not change.For example,if it is sunny and 87 degrees today,the persistence method predicts that it will be sunny and 87 degrees tomorrow. If two inches of rain fell today,the persistence method would predict two inches of rain for tomorrow. However,if weather conditions change significantly from day to day,the persistence method usually breaks down and is not the best forecasting method to use.The trends method involves determining the speed and direction of movement for fronts,high and low pressure centers , and areas of clouds and precipitation（降水量）.Using this information , the forecaster can predict where he or she expects those features to be at some future time.For example,if a storm system is 1,000 miles west of your location and moving to the east at 250 miles per day,using the trends method you would predict it arrive in your area in 4 days.The trends method works well when systems continue to move at the same speed in the same direction for a long period of time.If they slow down,speed up,change intensi- ty,or change directions,the trends forecast will probably not work as well.The climatology（气候学）method is another simple way of producing a forecast. This method involves averaging weather statistics accumulated over many years to make the forecast.For example,if you were using the climatology method to predict the weather for New York City on July 4th,you would go through all the weather data that has been recorded for every July 4th and take an average.The climatology method oniy works well when the weather pattern is similar to that expected for the chosen time of year. If the pattern is quite unusual for the given time of year,the climatology method will often fail.The analog method is a slightly more complicated method of producing a forecast.It involves examining today's forecast scenario（模式）and remembering a day in the past when the weather scenario looked very similar(an analog).The forecaster would predict that the weather in this forecast will behave the same as ii did in the past.The analog method is difficult to use because it is virtually impossible to find a predict ana- log.Various weather features rarely align themselves in the same locations as they were in the previous time. Even small differences between the current time and the analog can lead to very different results.The persistence method fails to work well when_________.A:it is rainyB:it is sunnyC:weather conditions change greatlyD:weather conditions stay stable
考题
共用题干
第一篇Forecasting MethodsThere are several different methods that can be used to create a forecast. The method a forecaster chooses depends upon the experience of the forecaster,the amount of information available to the forecaster,the level of difficulty that the forecast situation presents,and the degree of accuracy or confidence needed in the forecast.The first of these methods is the persistence method,the simplest way of producing a forecast.The per- sistence method assumes that the conditions at the time of the forecast will not change.For example,if it is sunny and 87 degrees today,the persistence method predicts that it will be sunny and 87 degrees tomorrow. If two inches of rain fell today,the persistence method would predict two inches of rain for tomorrow. However,if weather conditions change significantly from day to day,the persistence method usually breaks down and is not the best forecasting method to use.The trends method involves determining the speed and direction of movement for fronts,high and low pressure centers , and areas of clouds and precipitation（降水量）.Using this information , the forecaster can predict where he or she expects those features to be at some future time.For example,if a storm system is 1,000 miles west of your location and moving to the east at 250 miles per day,using the trends method you would predict it arrive in your area in 4 days.The trends method works well when systems continue to move at the same speed in the same direction for a long period of time.If they slow down,speed up,change intensi- ty,or change directions,the trends forecast will probably not work as well.The climatology（气候学）method is another simple way of producing a forecast. This method involves averaging weather statistics accumulated over many years to make the forecast.For example,if you were using the climatology method to predict the weather for New York City on July 4th,you would go through all the weather data that has been recorded for every July 4th and take an average.The climatology method oniy works well when the weather pattern is similar to that expected for the chosen time of year. If the pattern is quite unusual for the given time of year,the climatology method will often fail.The analog method is a slightly more complicated method of producing a forecast.It involves examining today's forecast scenario（模式）and remembering a day in the past when the weather scenario looked very similar(an analog).The forecaster would predict that the weather in this forecast will behave the same as ii did in the past.The analog method is difficult to use because it is virtually impossible to find a predict ana- log.Various weather features rarely align themselves in the same locations as they were in the previous time. Even small differences between the current time and the analog can lead to very different results.The analog method should not be used in making a weather forecast when________.A: the current weather scenario is different from the analogB:the analog looks complicatedC:the analog is more than 10 years oldD:the current weather scenario is exactly the same as the analog
考题
共用题干
第一篇Forecasting MethodsThere are several different methods that can be used to create a forecast. The method a forecaster chooses depends upon the experience of the forecaster,the amount of information available to the forecaster,the level of difficulty that the forecast situation presents,and the degree of accuracy or confidence needed in the forecast.The first of these methods is the persistence method,the simplest way of producing a forecast.The per- sistence method assumes that the conditions at the time of the forecast will not change.For example,if it is sunny and 87 degrees today,the persistence method predicts that it will be sunny and 87 degrees tomorrow. If two inches of rain fell today,the persistence method would predict two inches of rain for tomorrow. However,if weather conditions change significantly from day to day,the persistence method usually breaks down and is not the best forecasting method to use.The trends method involves determining the speed and direction of movement for fronts,high and low pressure centers , and areas of clouds and precipitation（降水量）.Using this information , the forecaster can predict where he or she expects those features to be at some future time.For example,if a storm system is 1,000 miles west of your location and moving to the east at 250 miles per day,using the trends method you would predict it arrive in your area in 4 days.The trends method works well when systems continue to move at the same speed in the same direction for a long period of time.If they slow down,speed up,change intensi- ty,or change directions,the trends forecast will probably not work as well.The climatology（气候学）method is another simple way of producing a forecast. This method involves averaging weather statistics accumulated over many years to make the forecast.For example,if you were using the climatology method to predict the weather for New York City on July 4th,you would go through all the weather data that has been recorded for every July 4th and take an average.The climatology method oniy works well when the weather pattern is similar to that expected for the chosen time of year. If the pattern is quite unusual for the given time of year,the climatology method will often fail.The analog method is a slightly more complicated method of producing a forecast.It involves examining today's forecast scenario（模式）and remembering a day in the past when the weather scenario looked very similar(an analog).The forecaster would predict that the weather in this forecast will behave the same as ii did in the past.The analog method is difficult to use because it is virtually impossible to find a predict ana- log.Various weather features rarely align themselves in the same locations as they were in the previous time. Even small differences between the current time and the analog can lead to very different results.The trends method works well when_________.A:weather features are defined well enoughB:predictions on precipitation are accurateC:weather features are constant for a long period of timeD:the speed and direction of movement are predicable
考题
共用题干
第一篇Forecasting MethodsThere are several different methods that can be used to create a forecast. The method a forecaster chooses depends upon the experience of the forecaster,the amount of information available to the forecaster,the level of difficulty that the forecast situation presents,and the degree of accuracy or confidence needed in the forecast.The first of these methods is the persistence method,the simplest way of producing a forecast.The per- sistence method assumes that the conditions at the time of the forecast will not change.For example,if it is sunny and 87 degrees today,the persistence method predicts that it will be sunny and 87 degrees tomorrow. If two inches of rain fell today,the persistence method would predict two inches of rain for tomorrow. However,if weather conditions change significantly from day to day,the persistence method usually breaks down and is not the best forecasting method to use.The trends method involves determining the speed and direction of movement for fronts,high and low pressure centers , and areas of clouds and precipitation（降水量）.Using this information , the forecaster can predict where he or she expects those features to be at some future time.For example,if a storm system is 1,000 miles west of your location and moving to the east at 250 miles per day,using the trends method you would predict it arrive in your area in 4 days.The trends method works well when systems continue to move at the same speed in the same direction for a long period of time.If they slow down,speed up,change intensi- ty,or change directions,the trends forecast will probably not work as well.The climatology（气候学）method is another simple way of producing a forecast. This method involves averaging weather statistics accumulated over many years to make the forecast.For example,if you were using the climatology method to predict the weather for New York City on July 4th,you would go through all the weather data that has been recorded for every July 4th and take an average.The climatology method oniy works well when the weather pattern is similar to that expected for the chosen time of year. If the pattern is quite unusual for the given time of year,the climatology method will often fail.The analog method is a slightly more complicated method of producing a forecast.It involves examining today's forecast scenario（模式）and remembering a day in the past when the weather scenario looked very similar(an analog).The forecaster would predict that the weather in this forecast will behave the same as ii did in the past.The analog method is difficult to use because it is virtually impossible to find a predict ana- log.Various weather features rarely align themselves in the same locations as they were in the previous time. Even small differences between the current time and the analog can lead to very different results.Historical weather data are necessary in_________.A:the climatology method and the analog methodB:the persistence method and the trends methodC:the trends method and the climatology methodD:the persistence method and the analog method
考题
Because of harsh weather conditions,more than a dozen states in the United States were declared disaster areas in 1977.A:severe
B:bizarre
C:moist
D:improbable
考题
单选题When recording the wind direction in the weather log，you would report the（）.A
direction the wind is blowing towardB
direction the wind is blowing fromC
duration of the maximum gust of windD
wind chill factor
考题
单选题By plotting the analysis messages on weather charts，we are able to（）.A
prevent any possible accident at seaB
prepare a reasonable forecast of the wind and weatherC
help the mariner to fix a accurate ship's positionD
aid the salvage of a ship in peril
考题
单选题How can you estimate the position of a tropical storm’s center?（）A
With a radio weather bulletin or weather faxB
using shipboard radarC
observe the wind direction and apply Buys Ballot's lawD
All of the above
考题
单选题Weather forecast messages are usually（）.A
Given only to TV stationsB
Transmitted only by commercial broadcast stationsC
Broadcast in plain languageD
Broadcast immediately on VHF Channel 16 and 2182 kHz
考题
单选题A weather forecast states that the wind will commence backing. In the Northern Hemisphere，this would indicate that it will（）.A
shift in a clockwise mannerB
shift in a counterclockwise mannerC
continue blowing from the same directionD
decrease in velocity
考题
单选题In rough weather，when a ship is able to maneuver，it is best to launch a lifeboat（）.A
on the lee sideB
on the windward sideC
with the wind dead aheadD
with the wind from astern
考题
单选题When observing a rapid rise in barometric pressure，you may expect（）.A
Clear weather with no wind，but the possibility of rain or snow within 24 hoursB
Deteriorating weather with rain or snowC
Heavy rain or severe thundershowersD
Clearing weather，possibly accompanied by high winds
考题
单选题As a licensed Merchant Marine Officer you are expected to（）.A
obtain a weather forecast before setting out from portB
listen to weather forecasts on the radio while enrouteC
understand all broadcast weather warning informationD
All of the above
考题
单选题Little or no change in the barometric reading over a twelve hour period indicates（）.A
stormy weather is imminentB
that present weather conditions will continueC
a defect in the barometerD
increasing wind strength
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