共用题干 第一篇California一A Land of Variety and ContrastCalifornia is a land of variety and contrast. Almost every type of physical land feature,sort of arctic ice fields and tropical jungles can be found within its borders.Sharply contrasting types of land ofte

共用题干
The Cold Places

The Arctic is a polar region.It surrounds the North Pole.
Like Antarctica,the Arctic is a land of ice and snow. Antarctica holds the record for a low temperature reading一125 degrees Fahrenheit below zero.Reading of 85 degrees below zero is common in both the Arctic and Antarctica. Winter temperatures average 30 degrees below zero in the Arctic. At the South Pole the winter average is about 73 degrees below zero.
One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arctic.This one thing is the low temperature一the killing chill of far North and the polar South.
To survive,men must wear the warmest possible clothing. They must build windproof shelters. They must keep heaters going at all times.Not even for a moment can they be unprotected against the below-zero temperatures.
Men have a way of providing for themselves.Polar explorers wrap themselves in warm coats and furs.The cold makes life difficult. But the explorers can stay alive.
What about animals?Can they survive?Do we find plants?Do we find life in the Arctic and in Antarctica?Yes,we do.There is life in the oceans.There is life on land.
Antarctica,as we have seen,is a cold place indeed.But this has not always been the case. Expedition scientists have discovered that Antarctica has not always been a frozen continent. At one time the weather in Antarctica may have much like our own.
Explorers have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests.Heat and moisture must have kept the trees in the forests alive.

At one time,the weather in Antarctica was so warm and damp that trees grew there.
A:Right
B:Wrong
C: Not mentioned

共用题干
The Cold Places

The Arctic is a polar region.It surrounds the North Pole.
Like Antarctica,the Arctic is a land of ice and snow. Antarctica holds the record for a low temperature reading一125 degrees Fahrenheit below zero.Reading of 85 degrees below zero is common in both the Arctic and Antarctica. Winter temperatures average 30 degrees below zero in the Arctic. At the South Pole the winter average is about 73 degrees below zero.
One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arctic.This one thing is the low temperature一the killing chill of far North and the polar South.
To survive,men must wear the warmest possible clothing. They must build windproof shelters. They must keep heaters going at all times.Not even for a moment can they be unprotected against the below-zero temperatures.
Men have a way of providing for themselves.Polar explorers wrap themselves in warm coats and furs.The cold makes life difficult. But the explorers can stay alive.
What about animals?Can they survive?Do we find plants?Do we find life in the Arctic and in Antarctica?Yes,we do.There is life in the oceans.There is life on land.
Antarctica,as we have seen,is a cold place indeed.But this has not always been the case. Expedition scientists have discovered that Antarctica has not always been a frozen continent. At one time the weather in Antarctica may have much like our own.
Explorers have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests.Heat and moisture must have kept the trees in the forests alive.

As discovered by expedition scientists,Antarctica has not always been so cold as it is today,so has the Arctic.
A:Right
B:Wrong
C:Not mentioned

共用题干
第一篇

California一A Land of Variety and Contrast

California is a land of variety and contrast. Almost every type of physical land feature,sort of arctic ice fields and tropical jungles can be found within its borders.Sharply contrasting types of land often lie very close to one another. People living in Bakersfield,for instance,can visit the Pacific Ocean and the coastal plain,the fertile San Joaquin Valley,the arid Mojave Desert,and the high Sierra Nevada,all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day,without having to travel long distance.
Contrast abounds in California. The highest point in the United States(outside Alaska)is in California,and so is the lowest point(including Alaska).Mount Whitney,14,494 feet above sea level,is separated from Death Valley,282 feet below sea level,by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles.
California has deep,clear mountain lakes like Lake Tahoe,the deepest in the country,but it also has shallow,salty desert lakes.It has Lake Tulainyo,12,020 feet above sea level,and the lowest lake in the country,the Salton Sea,236 feet below sea level. Some of its lakes,like Owens Lake in Death Valley,are not lakes at all:they are dried up lake beds.
In addition to mountains,lakes,valleys,deserts,and plateaus,California has its Pacific coastline,stretching longer than the coastlines of Oregon and Washington combined.

How far away is Death Valley from Mount Whitney?
A:About 3 miles.
B:Only 100 miles.
C:282 feet.
D:14,494 feet.

共用题干
第一篇

California一A Land of Variety and Contrast

California is a land of variety and contrast. Almost every type of physical land feature,sort of arctic ice fields and tropical jungles can be found within its borders.Sharply contrasting types of land often lie very close to one another. People living in Bakersfield,for instance,can visit the Pacific Ocean and the coastal plain,the fertile San Joaquin Valley,the arid Mojave Desert,and the high Sierra Nevada,all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day,without having to travel long distance.
Contrast abounds in California. The highest point in the United States(outside Alaska)is in California,and so is the lowest point(including Alaska).Mount Whitney,14,494 feet above sea level,is separated from Death Valley,282 feet below sea level,by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles.
California has deep,clear mountain lakes like Lake Tahoe,the deepest in the country,but it also has shallow,salty desert lakes.It has Lake Tulainyo,12,020 feet above sea level,and the lowest lake in the country,the Salton Sea,236 feet below sea level. Some of its lakes,like Owens Lake in Death Valley,are not lakes at all:they are dried up lake beds.
In addition to mountains,lakes,valleys,deserts,and plateaus,California has its Pacific coastline,stretching longer than the coastlines of Oregon and Washington combined.

Which statement best demonstrates that California is a land of variety and contrast?
A:The highest lake in California is Lake Tulainyo.
B:It is possible to go surfing and snow skiing in some parts of California without having to travel long distance.
C:Sierra Nevada,San Joaquin Valley,Mojave Desert and the Pacific Ocean all lie within a radius of about 100 miles.
D:Owens Lake,in Death Valley,is not really a lake at all.

共用题干
The Cold Places
The Arctic is a polar region.It surrounds the North Pole.
Like Antarctica,the Arctic is a land of ice and snow.Antarctica holds the record for a low temperature reading-125 degrees
Fahrenheit below zero. Reading of 85 degrees below zero is common in both the Arctic and Antarctica.Winter temperatures average 30 degrees below zero in the Arctic .At the South Pole the winter average is about 73 degrees below zero.
One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arctic .This one thing is the low temperature-the killing chill of far North and the polar South.
To survive,men must wear the warmest possible clothing. They must build windproof shelters .They must keep heaters going at all times.Not ever for a moment can they be unprotected against the below-zero temperatures.
Men have a way of providing for themselves.Polar explorers wrap themselves in warm coats and furs .The cold makes life difficult. But the explorers can stay alive.
What about animals?Can they survive?Do we find plants?Do we find life in the Arctic and in Antarctica?Yes,we do. There is life in the oceans.There is life on land.
Antarctica,as we have seen,is a cold place indeed.But this has not always been the case.
Expedition scientists have discovered that Antarctica has not always been a frozen continent. At one time the weather in Antarctica may have much like our own.
Explorers have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests.Heat and moisture must have kept the trees in the forests alive.

Despite the hostile environment,both animals and plants can be found in the oceans and on land in polar areas.
A: Right
B: Wrong
C: Not mentioned

共用题干
第一篇

Water Resources on the Earth

The second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.
The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.

There is more of rainfall________.
A:over the mountains than over the rivers
B:over the rivers than over the mountains
C:over the land than over the oceans
D:over the oceans than over the land

共用题干
第一篇

California一A Land of Variety and Contrast

California is a land of variety and contrast. Almost every type of physical land feature,sort of arctic ice fields and tropical jungles can be found within its borders.Sharply contrasting types of land often lie very close to one another. People living in Bakersfield,for instance,can visit the Pacific Ocean and the coastal plain,the fertile San Joaquin Valley,the arid Mojave Desert,and the high Sierra Nevada,all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day,without having to travel long distance.
Contrast abounds in California. The highest point in the United States(outside Alaska)is in California,and so is the lowest point(including Alaska).Mount Whitney,14,494 feet above sea level,is separated from Death Valley,282 feet below sea level,by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles.
California has deep,clear mountain lakes like Lake Tahoe,the deepest in the country,but it also has shallow,salty desert lakes.It has Lake Tulainyo,12,020 feet above sea level,and the lowest lake in the country,the Salton Sea,236 feet below sea level. Some of its lakes,like Owens Lake in Death Valley,are not lakes at all:they are dried up lake beds.
In addition to mountains,lakes,valleys,deserts,and plateaus,California has its Pacific coastline,stretching longer than the coastlines of Oregon and Washington combined.

Which of the following is NOT mentioned in the passage as being within a radius of about 100 miles of Bakersfield?
A:The Pacific Ocean.
B:San Joaquin Valley.
C:Mojave Desert.
D:Oregon and Washington.

共用题干
The Cold Places

The Arctic is a polar region.It surrounds the North Pole.
Like Antarctica,the Arctic is a land of ice and snow. Antarctica holds the record for a low temperature reading一125 degrees Fahrenheit below zero.Reading of 85 degrees below zero is common in both the Arctic and Antarctica. Winter temperatures average 30 degrees below zero in the Arctic. At the South Pole the winter average is about 73 degrees below zero.
One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arctic.This one thing is the low temperature一the killing chill of far North and the polar South.
To survive,men must wear the warmest possible clothing. They must build windproof shelters. They must keep heaters going at all times.Not even for a moment can they be unprotected against the below-zero temperatures.
Men have a way of providing for themselves.Polar explorers wrap themselves in warm coats and furs.The cold makes life difficult. But the explorers can stay alive.
What about animals?Can they survive?Do we find plants?Do we find life in the Arctic and in Antarctica?Yes,we do.There is life in the oceans.There is life on land.
Antarctica,as we have seen,is a cold place indeed.But this has not always been the case. Expedition scientists have discovered that Antarctica has not always been a frozen continent. At one time the weather in Antarctica may have much like our own.
Explorers have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests.Heat and moisture must have kept the trees in the forests alive.

Despite the hostile environment,both animals and plants can be found in the oceans and on land in polar areas.
A:Right
B:Wrong
C:Not mentioned

共用题干
The Cold Places

The Arctic is a polar region.It surrounds the North Pole.
Like Antarctica,the Arctic is a land of ice and snow. Antarctica holds the record for a low temperature reading一125 degrees Fahrenheit below zero.Reading of 85 degrees below zero is common in both the Arctic and Antarctica. Winter temperatures average 30 degrees below zero in the Arctic. At the South Pole the winter average is about 73 degrees below zero.
One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arctic.This one thing is the low temperature一the killing chill of far North and the polar South.
To survive,men must wear the warmest possible clothing. They must build windproof shelters. They must keep heaters going at all times.Not even for a moment can they be unprotected against the below-zero temperatures.
Men have a way of providing for themselves.Polar explorers wrap themselves in warm coats and furs.The cold makes life difficult. But the explorers can stay alive.
What about animals?Can they survive?Do we find plants?Do we find life in the Arctic and in Antarctica?Yes,we do.There is life in the oceans.There is life on land.
Antarctica,as we have seen,is a cold place indeed.But this has not always been the case. Expedition scientists have discovered that Antarctica has not always been a frozen continent. At one time the weather in Antarctica may have much like our own.
Explorers have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests.Heat and moisture must have kept the trees in the forests alive.

Polar explorers can stay alive without heaters and windproof shelters.
A:Right
B:Wrong
C:Not mentioned

Antarctic differs fundamentally from the Arctic regions.The Arctic is an ocean,（ ）with drifting packed ice and surrounded by the land masses of Europe,Asia,and North America.

A.covered
B.filled
C.connected
D.lined

共用题干
The Cold Places
The Arctic is a polar region.It surrounds the North Pole.
Like Antarctica,the Arctic is a land of ice and snow.Antarctica holds the record for a low temperature reading-125 degrees
Fahrenheit below zero. Reading of 85 degrees below zero is common in both the Arctic and Antarctica.Winter temperatures average 30 degrees below zero in the Arctic .At the South Pole the winter average is about 73 degrees below zero.
One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arctic .This one thing is the low temperature-the killing chill of far North and the polar South.
To survive,men must wear the warmest possible clothing. They must build windproof shelters .They must keep heaters going at all times.Not ever for a moment can they be unprotected against the below-zero temperatures.
Men have a way of providing for themselves.Polar explorers wrap themselves in warm coats and furs .The cold makes life difficult. But the explorers can stay alive.
What about animals?Can they survive?Do we find plants?Do we find life in the Arctic and in Antarctica?Yes,we do. There is life in the oceans.There is life on land.
Antarctica,as we have seen,is a cold place indeed.But this has not always been the case.
Expedition scientists have discovered that Antarctica has not always been a frozen continent. At one time the weather in Antarctica may have much like our own.
Explorers have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests.Heat and moisture must have kept the trees in the forests alive.

Polar explorers can stay alive without heaters and windproof shelters.
A: Right
B: Wrong
C: Not mentioned