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In previous times,when fresh meat was inadequate,pigeons were kept by many households as a source of food.
A:in short store
B:in short provision
C:in short reserve
D:in short supply
B:in short provision
C:in short reserve
D:in short supply
参考答案
参考解析
解析：以前缺少新鲜肉的时候，许多家里都把鸽肉当成一种食物。store"贮藏、储备”，例如：I have a store of food here．我这里备有食物。provision“供应、提供”，不可数名词，没有in… provision这种用法，常用于“the provision of…"，例如：The company is responsible for the provision of the residential care services．这家公司负责提供物业服务。reserve作可数名词，指“储备”，例如：the world's oil reserves世界石油储备。supply“供应、供给”, in short supply固定用法，指“供给不足”，例如：Fresh vegetable used to be in short supply during the winter．过去在冬季新鲜蔬菜短缺。因此选D。
更多 “ In previous times,when fresh meat was inadequate,pigeons were kept by many households as a source of food.A:in short store B:in short provision C:in short reserve D:in short supply” 相关考题
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考题
Passage 1
Plants and animals that have been studied carefully seem to have built-in clocks. These biological clocks, as they are called, usually are not quite exact in measuring time. However, they work pretty well because they are "reset" each day, when the sun comes up.
Do pigeons use their biological clocks to help them find directions from the sun? We can keep pigeons in a room lit only by lamps. And we can program the lighting to produce artificial "days",different from the day outside. After a while we have shifted their clocks. Now we take them far away from home and let them go on a sunny day. Most of thegn start out as if they know just which way to go, but choose a wrong direction. They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks.
It is known and experimented that homing pigeons can tell directions by the sun. But what happens when the sky is darkly overcast by clouds and no one can see where the sun is? Then the pigeons still find their way home. The salne experiment has been repeated many times on sunny days and the result was always the same. But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions. So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun.
Naturally, people have wondered whether pigeons might have a built-in compass—something that would tell them about the directions of the earth's magnetic field. One way to test that idea would be to see if a pigeon's sense of direction can be fooled by a magnet attached to its back.
With a strong magnet close by, a compass can no longer tell direction.
To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs.
Another group carried brass bars instead which were not magnetic. In a number of experiments,both groups were taken away from home and let go. On sunny days none of the magnet-pigeons was fooled. They were just as good as the brass-pigeons in starting out in the right direction toward home. On cloudy, overcast days, however, with no sun the brass-pigeons chose the right direction,but the magnet-pigeons were in trouble. They later started out in different directions and acted completely lost.
Which is true about pigeons' finding directions?
查看材料
A．With a brass on back they can find directions sooner.
B．They can find directions better than other birds.
C．They use the earth's magnetic field and the sun to find directions.
D．They can find directions only to their home.
考题
Passage 1
Plants and animals that have been studied carefully seem to have built-in clocks. These biological clocks, as they are called, usually are not quite exact in measuring time. However, they work pretty well because they are "reset" each day, when the sun comes up.
Do pigeons use their biological clocks to help them find directions from the sun? We can keep pigeons in a room lit only by lamps. And we can program the lighting to produce artificial "days",different from the day outside. After a while we have shifted their clocks. Now we take them far away from home and let them go on a sunny day. Most of thegn start out as if they know just which way to go, but choose a wrong direction. They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks.
It is known and experimented that homing pigeons can tell directions by the sun. But what happens when the sky is darkly overcast by clouds and no one can see where the sun is? Then the pigeons still find their way home. The salne experiment has been repeated many times on sunny days and the result was always the same. But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions. So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun.
Naturally, people have wondered whether pigeons might have a built-in compass—something that would tell them about the directions of the earth's magnetic field. One way to test that idea would be to see if a pigeon's sense of direction can be fooled by a magnet attached to its back.
With a strong magnet close by, a compass can no longer tell direction.
To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs.
Another group carried brass bars instead which were not magnetic. In a number of experiments,both groups were taken away from home and let go. On sunny days none of the magnet-pigeons was fooled. They were just as good as the brass-pigeons in starting out in the right direction toward home. On cloudy, overcast days, however, with no sun the brass-pigeons chose the right direction,but the magnet-pigeons were in trouble. They later started out in different directions and acted completely lost.
What can be inferred from the passage about biological clocks?
查看材料
A．They are used by all plants and animals to tell time.
B．Pigeons' biological clocks are regulated every day with the sunrise.
C．The built-in biological clocks cannot be changed.
D．They gradually developed as pigeons grow mature.
考题
Passage 1
Plants and animals that have been studied carefully seem to have built-in clocks. These biological clocks, as they are called, usually are not quite exact in measuring time. However, they work pretty well because they are "reset" each day, when the sun comes up.
Do pigeons use their biological clocks to help them find directions from the sun? We can keep pigeons in a room lit only by lamps. And we can program the lighting to produce artificial "days",different from the day outside. After a while we have shifted their clocks. Now we take them far away from home and let them go on a sunny day. Most of thegn start out as if they know just which way to go, but choose a wrong direction. They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks.
It is known and experimented that homing pigeons can tell directions by the sun. But what happens when the sky is darkly overcast by clouds and no one can see where the sun is? Then the pigeons still find their way home. The salne experiment has been repeated many times on sunny days and the result was always the same. But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions. So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun.
Naturally, people have wondered whether pigeons might have a built-in compass—something that would tell them about the directions of the earth's magnetic field. One way to test that idea would be to see if a pigeon's sense of direction can be fooled by a magnet attached to its back.
With a strong magnet close by, a compass can no longer tell direction.
To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs.
Another group carried brass bars instead which were not magnetic. In a number of experiments,both groups were taken away from home and let go. On sunny days none of the magnet-pigeons was fooled. They were just as good as the brass-pigeons in starting out in the right direction toward home. On cloudy, overcast days, however, with no sun the brass-pigeons chose the right direction,but the magnet-pigeons were in trouble. They later started out in different directions and acted completely lost.
Which of the following can best describe the organization of the passage?
查看材料
A．Questions are raised first and then experiments to answer them are cited.
B．Opinions are given first and then evidences against them are quoted.
C．Statements come first and examples supporting them follow.
D．People's long held beliefs are cited first and exceptions come after.
考题
Passage 1
Plants and animals that have been studied carefully seem to have built-in clocks. These biological clocks, as they are called, usually are not quite exact in measuring time. However, they work pretty well because they are "reset" each day, when the sun comes up.
Do pigeons use their biological clocks to help them find directions from the sun? We can keep pigeons in a room lit only by lamps. And we can program the lighting to produce artificial "days",different from the day outside. After a while we have shifted their clocks. Now we take them far away from home and let them go on a sunny day. Most of thegn start out as if they know just which way to go, but choose a wrong direction. They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks.
It is known and experimented that homing pigeons can tell directions by the sun. But what happens when the sky is darkly overcast by clouds and no one can see where the sun is? Then the pigeons still find their way home. The salne experiment has been repeated many times on sunny days and the result was always the same. But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions. So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun.
Naturally, people have wondered whether pigeons might have a built-in compass—something that would tell them about the directions of the earth's magnetic field. One way to test that idea would be to see if a pigeon's sense of direction can be fooled by a magnet attached to its back.
With a strong magnet close by, a compass can no longer tell direction.
To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs.
Another group carried brass bars instead which were not magnetic. In a number of experiments,both groups were taken away from home and let go. On sunny days none of the magnet-pigeons was fooled. They were just as good as the brass-pigeons in starting out in the right direction toward home. On cloudy, overcast days, however, with no sun the brass-pigeons chose the right direction,but the magnet-pigeons were in trouble. They later started out in different directions and acted completely lost.
How can people shift pigeons' biological clocks?
查看材料
A．By training them when they are young.
B．By minor and harmless operations.
C．By taking them really far away from home.
D．By keeping them in artificial days.
考题
Passage 1
Plants and animals that have been studied carefully seem to have built-in clocks. These biological clocks, as they are called, usually are not quite exact in measuring time. However, they work pretty well because they are "reset" each day, when the sun comes up.
Do pigeons use their biological clocks to help them find directions from the sun? We can keep pigeons in a room lit only by lamps. And we can program the lighting to produce artificial "days",different from the day outside. After a while we have shifted their clocks. Now we take them far away from home and let them go on a sunny day. Most of thegn start out as if they know just which way to go, but choose a wrong direction. They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks.
It is known and experimented that homing pigeons can tell directions by the sun. But what happens when the sky is darkly overcast by clouds and no one can see where the sun is? Then the pigeons still find their way home. The salne experiment has been repeated many times on sunny days and the result was always the same. But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions. So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun.
Naturally, people have wondered whether pigeons might have a built-in compass—something that would tell them about the directions of the earth's magnetic field. One way to test that idea would be to see if a pigeon's sense of direction can be fooled by a magnet attached to its back.
With a strong magnet close by, a compass can no longer tell direction.
To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs.
Another group carried brass bars instead which were not magnetic. In a number of experiments,both groups were taken away from home and let go. On sunny days none of the magnet-pigeons was fooled. They were just as good as the brass-pigeons in starting out in the right direction toward home. On cloudy, overcast days, however, with no sun the brass-pigeons chose the right direction,but the magnet-pigeons were in trouble. They later started out in different directions and acted completely lost.
What does the author want to say by citing the last experiment?
查看材料
A．On heavily cloudy days, pigeons that are not well trained do not fly.
B．Pigeons use different sources to find directions on different weather.
C．Magnetic field is an important source in helping pigeons to find directions.
D．The little magnet bars make it easier for pigeons to find directions.
考题
材料题
C
The trick in food photography is to show the food looking fresh，so many dishes have stand-ins，just as movie stars do．“When I get my lights and cameras set up，I remove the stand-in and put in the real thing，”explains Ray Webber，who photographs food for magazine advertisements．“Sometimes I have to brush the meat with its juices because it may have dried out a bit．A and when I‘m shooting（拍照）something like tomatoes，I always carry water to spray them with dew just before I shoot．”
Shooting food outdoors has special problems．“I‘m always worrying about flies or worms crawling up a glass，”Webber explains，“my worry is that someday a dog will come up from behind and run off with the food．”Once Webber was shooting a piece of cheese outdoors and needed something to make its color beautiful．Finally he found it：a weed with lovely blue flowers．When the shot appeared，several people were horrified-the weed was deadly nightshade！
（）Just before being photographed，some meats and vegetables are_______．
Webber is afraid dogs might_______．A.bark while he is shooting
B.get into his picture
C.steal the food
D.upset his camera
考题
材料题
C
The trick in food photography is to show the food looking fresh，so many dishes have stand-ins，just as movie stars do．“When I get my lights and cameras set up，I remove the stand-in and put in the real thing，”explains Ray Webber，who photographs food for magazine advertisements．“Sometimes I have to brush the meat with its juices because it may have dried out a bit．A and when I‘m shooting（拍照）something like tomatoes，I always carry water to spray them with dew just before I shoot．”
Shooting food outdoors has special problems．“I‘m always worrying about flies or worms crawling up a glass，”Webber explains，“my worry is that someday a dog will come up from behind and run off with the food．”Once Webber was shooting a piece of cheese outdoors and needed something to make its color beautiful．Finally he found it：a weed with lovely blue flowers．When the shot appeared，several people were horrified-the weed was deadly nightshade！
（）Just before being photographed，some meats and vegetables are_______．
The second paragraph deals mostly with the________．A.differences between indoor and outdoor photography
B.problems of outdoor food photography
C.ways of keeping food fresh outdoors
D.combinations of colors outdoors
考题
材料题
C
The trick in food photography is to show the food looking fresh，so many dishes have stand-ins，just as movie stars do．“When I get my lights and cameras set up，I remove the stand-in and put in the real thing，”explains Ray Webber，who photographs food for magazine advertisements．“Sometimes I have to brush the meat with its juices because it may have dried out a bit．A and when I‘m shooting（拍照）something like tomatoes，I always carry water to spray them with dew just before I shoot．”
Shooting food outdoors has special problems．“I‘m always worrying about flies or worms crawling up a glass，”Webber explains，“my worry is that someday a dog will come up from behind and run off with the food．”Once Webber was shooting a piece of cheese outdoors and needed something to make its color beautiful．Finally he found it：a weed with lovely blue flowers．When the shot appeared，several people were horrified-the weed was deadly nightshade！
（）Just before being photographed，some meats and vegetables are_______．
（）A.fanned
B.dyed
C.frozen
D.made wet
考题
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diedB
treatedC
survivedD
neglected
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only in fogB
only between the hours of sunset and sunriseC
only when entering and leaving portD
at all times
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Add one hour to the times listed under the reference stationsB
Subtract one hour from the time differences listed for the subordinate stationsC
Apply no correction as the times in the reference stations are adjusted for daylight savings timeD
Add 15° to the standard meridian when calculating the time difference
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three times many asB
many as three timesC
as many three timesD
three times as many
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was rainingB
would be rainingC
had been rainingD
rained
考题
问答题Water is vital for our survival and for producing food. It takes about a thousand tons of water to produce one tone of grain that, fed to cows, produces only 18 pounds of meat. Today mankind is using about 160 billion tons more water each year than is being replenished by rain and fed back into water storages. If this water were carried in water trucks, it would require a 300, 000-mile-long convoy of trucks every day—a convoy length 37 times the diameter of the Earth. This is how much water we are using and not replenishing.
考题
单选题At an unsheltered anchorage the chief engineer officer shall consult with the master whetheror not to maintain an underway watch“An underway watch” means（）A
a watch which is kept with lower standardB
a watch which is kept when the ship isnt sailingC
a watch which is kept when the ship is sailingD
a watch which is kept when the ship is in a restricted visibility area
考题
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考题
单选题Many times when he was in terrible pain he had _____ to be allowed to die.A
reiteratedB
remittedC
prayedD
relieved
考题
单选题Allowance for fresh water refers to（）.A
the provision to be provided when the vessel sails in fresh water areaB
the fresh water to be carried by a vesselC
the allowance of fresh water for each crew member when in distress at seaD
the amount of free board decreased when sailing in fresh water area
考题
单选题For many years marine centrifuges were designed for （） operation, that is the machines were run for a period during which solids accumulated in the bowlThe machine was stopped when the accumulated solids began to impair its performance.A
purifyingB
batchC
long periodD
temporary
考题
单选题Many times important issues can get sidetracked in a meeting,（）when everyone has a different opinion about the topic.A
essentiallyB
entirellyC
extremelyD
especially
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