A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week according to the National Weather Service.According to the NWS a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.Temperatures across the Midwest will drop into the 60s and 70s-a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and WashingtonThe cool breezes may be a welcome relief this time around but remember the last few times we got hit with Arctic air？Temperatures in cities including Chicago Cleveland New York and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we’re sure you rememberAccording to the National Weather Service____A. the cool mass of air originates from CanadaB. a mass of cold air will affect both Canada and the U.SC. the chilly weather is back to the globeD. only the upper Midwest will be affected by the cool air
A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week according to the National Weather Service.
According to the NWS a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.
Temperatures across the Midwest will drop into the 60s and 70s-a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and Washington
The cool breezes may be a welcome relief this time around but remember the last few times we got hit with Arctic air？
Temperatures in cities including Chicago Cleveland New York and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we’re sure you remember
According to the National Weather Service____
According to the NWS a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.
Temperatures across the Midwest will drop into the 60s and 70s-a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and Washington
The cool breezes may be a welcome relief this time around but remember the last few times we got hit with Arctic air？
Temperatures in cities including Chicago Cleveland New York and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we’re sure you remember
According to the National Weather Service____
A. the cool mass of air originates from Canada
B. a mass of cold air will affect both Canada and the U.S
C. the chilly weather is back to the globe
D. only the upper Midwest will be affected by the cool air
B. a mass of cold air will affect both Canada and the U.S
C. the chilly weather is back to the globe
D. only the upper Midwest will be affected by the cool air
参考解析
解析：细节题。根据文段提到的“A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week according to the National Weather Service”。我们从这句当中可以知道，在加拿大和阿拉斯加地区形成的冷空气大规模的向美国行进。可知A项符合。B项指的冷空气会同时影响加拿大和美国。C项寒流天气会重来。D项仅仅是海拔较高的中部地区会受寒潮的影响。BCD项均不符文意。因此答案选A。
相关考题：
The authors of the United States constitution attempted to establish an effective national government while preserving ______for the states and liberty for individuals.A autonomy B dignity C monopoly D stability
Which of the following statements is TRUE according to the passage?A. Some companies in the United States moved to Sweden, Germany and Belgium.B. Fresh air, spacious room and being away from others attract people to move to the suburbs.C. People wouldn't pay tax when they moved out of cities.D. The neighborhood should be maintained by old and poor people.
Temperature and moisture characteristics are modified in a warm or cold air mass due to ______.A.pressure changes in the air massB.movement of the air massC.the heterogeneous nature of the air massD.upper level atmospheric changes
Steam smoke will occur when ______.A.extremely cold air from shore passes over warmer waterB.warm dry air from shore passes over cooler waterC.cold ocean water evaporates into warm airD.cool rain passes through a warm air mass
A source of an air mass labeled mTw is ______.A.the equatorB.the Gulf of MexicoC.AlaskaD.Canada
A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week according to the National Weather Service.According to the NWS a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.Temperatures across the Midwest will drop into the 60s and 70s-a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and WashingtonThe cool breezes may be a welcome relief this time around but remember the last few times we got hit with Arctic air？Temperatures in cities including Chicago Cleveland New York and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we’re sure you rememberAccording to the passage, what happened in early 2014?A. Temperatures in the U.S fell into negative territoryB. People welcomed cool breezes in the U.SC. Harsh winter struck in some cities of the U.SD. Arctic air hit the U.S for a few times
A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week according to the National Weather Service.According to the NWS a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.Temperatures across the Midwest will drop into the 60s and 70s-a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and WashingtonThe cool breezes may be a welcome relief this time around but remember the last few times we got hit with Arctic air？Temperatures in cities including Chicago Cleveland New York and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we’re sure you rememberWhat’s the temperature when the report was written?A. About 60s and 70sB. Between 60s and 90sC. Below 60sD. About 80s and 90s
Because of harsh weather conditions,more than a dozen states in the United States were declared disaster areas in 1977.A:severeB:bizarreC:moistD:improbable
资料：We never thought we'd say this, but we'd welcome back some chilly weather.A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week, according to the National Weather Service.According to the NWS, a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.Temperatures across the Midwest will drop into the 60s and 70s—a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and Washington.The cool breezes may be a welcome relief this time around, but remember the last few times we got hit with Arctic air?Temperatures in cities including Chicago, Cleveland, New York, and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we're sure you remember.According to the National Weather Service, ___.A.the cool mass of air originates from CanadaB.a mass of cold air will affect both Canada and the U.S.C.the chilly weather is back to the globeD.only the upper Midwest will be affected by the cool air
资料：We never thought we'd say this, but we'd welcome back some chilly weather.A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week, according to the National Weather Service.According to the NWS, a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.Temperatures across the Midwest will drop into the 60s and 70s—a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and Washington.The cool breezes may be a welcome relief this time around, but remember the last few times we got hit with Arctic air?Temperatures in cities including Chicago, Cleveland, New York, and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we're sure you remember.According to the passage, what happened in early 2014?A.Temperatures in the U.S. fell into negative territory.B.People welcomed cool breezes in the U.S.C.Harsh winter struck in some cities of the U.S.D.Arctic air hit the U.S. for a few times.
资料：We never thought we'd say this, but we'd welcome back some chilly weather.A cool mass of air heads toward the United States from the upper regions of Canada and Alaska this week, according to the National Weather Service.According to the NWS, a mass of cold air will drop from the Arctic regions to Canada and then the upper Midwest next week.Temperatures across the Midwest will drop into the 60s and 70s—a sharp difference from the 80 degree and 90 degree temperatures from recent weeks. And the relatively cooler air may be felt as far East as New York and Washington.The cool breezes may be a welcome relief this time around, but remember the last few times we got hit with Arctic air?Temperatures in cities including Chicago, Cleveland, New York, and Louisville fell into single-digit and negative territory for long stretches during the harsh winter months of early 2014. But we're sure you remember.What’s the temperature when the report was written?A.About 60s and 70s.B.Between 60s and 90s.C.Below 60s.D.About 80s and 90s.
共用题干第三篇AlaskaIn 1959 Americans welcomed Alaska into the Union as the 49th state,symbolizing a change of attitude from that held in 1867, when the peninsula（半岛）was purchased from Russia.Then, most Americans had little interest in 1,500,000 square kilometers"of icebergs and polar bears"-beyond Canada's western borders,far from the settled areas of the United States.In those sections of the state which lie above the Arctic Circle,Alaska still is a land of icebergs and polar bears.Ice masses lie buried in the earth.From early May until early August,the midnight sun never :ts on this flat,treeless region,but the sun cannot melt the icy soil more than two-thirds of a meter down.Alaska is America's largest state,but only about 325,000 people live there.According to estimates, 800，000 hectares of its land area are fit for plowing but only about 640,000 hectares are being cultivated?Arctic Alaska has been the home of Eskimos for countless centuries.It is believed that the Eskimos moved there from Mongolia or Siberia,probably crossing Bering Strait,named for Vitus Bering,the Danish ea captain who discovered Alaska on his voyage for Russia in 1741.The Eskimos are the state's earliest known inhabitants.Russian fur traders established settlements but,by the time Alaska was sold to the United States,most of the traders had departed.In 1896 gold was discovered near the Klondike River in Canada just across the Alaskan border.Thousands of Americans rushed to the region on their way to Klondike;some never returned.Alaska was ,ever completely cut off again,although even today transportation is a major problem.There are only two motor routes from the US mainland,and within the state,every town has its own airfield.Planes fly passengers,mail and freight to the most distant villages.The gold that changed life so suddenly for Alaska was soon ended,and although many stories about fining camps have become part of American literature,the gold from Alaskan earth contributed less to ,economic progress than the fish from Alaskan waters.The fish?caught in a single year range in value from $80 million to $90 million.Fur一bearing animals are plentiful in the forests and streams,and valuable fur seals inhabit the waters.After fishing,the state's chief industry is lumber and the production of wood pulp（纸浆）.In recent years,Alaska's single most important resource has become oil.The state also has large deposits of coal,copper,gold and other minerals.Alaska is an American state that________.A:locates within the Arctic CircleB:was known by Americans before 1867C:lies to the east of CanadaD:was once owned by Russia
共用题干第三篇AlaskaIn 1959 Americans welcomed Alaska into the Union as the 49th state,symbolizing a change of attitude from that held in 1867, when the peninsula（半岛）was purchased from Russia.Then, most Americans had little interest in 1,500,000 square kilometers"of icebergs and polar bears"-beyond Canada's western borders,far from the settled areas of the United States.In those sections of the state which lie above the Arctic Circle,Alaska still is a land of icebergs and polar bears.Ice masses lie buried in the earth.From early May until early August,the midnight sun never :ts on this flat,treeless region,but the sun cannot melt the icy soil more than two-thirds of a meter down.Alaska is America's largest state,but only about 325,000 people live there.According to estimates, 800，000 hectares of its land area are fit for plowing but only about 640,000 hectares are being cultivated?Arctic Alaska has been the home of Eskimos for countless centuries.It is believed that the Eskimos moved there from Mongolia or Siberia,probably crossing Bering Strait,named for Vitus Bering,the Danish ea captain who discovered Alaska on his voyage for Russia in 1741.The Eskimos are the state's earliest known inhabitants.Russian fur traders established settlements but,by the time Alaska was sold to the United States,most of the traders had departed.In 1896 gold was discovered near the Klondike River in Canada just across the Alaskan border.Thousands of Americans rushed to the region on their way to Klondike;some never returned.Alaska was ,ever completely cut off again,although even today transportation is a major problem.There are only two motor routes from the US mainland,and within the state,every town has its own airfield.Planes fly passengers,mail and freight to the most distant villages.The gold that changed life so suddenly for Alaska was soon ended,and although many stories about fining camps have become part of American literature,the gold from Alaskan earth contributed less to ,economic progress than the fish from Alaskan waters.The fish?caught in a single year range in value from $80 million to $90 million.Fur一bearing animals are plentiful in the forests and streams,and valuable fur seals inhabit the waters.After fishing,the state's chief industry is lumber and the production of wood pulp（纸浆）.In recent years,Alaska's single most important resource has become oil.The state also has large deposits of coal,copper,gold and other minerals.What is true about the Eskimos?A:They are the natives of Alaska.B:They moved to Alaska from Denmark.C:They had a long fight with the Russian traders?D:They discovered gold near the Klondike River.
单选题According to the Weather Channel, there is a ______ of rain or even snow in the southwestern region of the United States.ApotentialBspeculationCchanceDplan
问答题Practice 3 The United States is a federal union of 50 states. The District of Columbia is the seat of the national government. The Constitution outlines the structure of the national government and specifies its powers and activities. Other governmental activities are the responsibilities of the individual states, which have their own constitutions and laws. Within each state are counties, townships, cities and villages, each of which has its own elective government. All government in the United States is “of, by and for the people”. Members of Congress, the President, state officials, and those who govern counties and cities are elected by popular vote. Heads of federal departments are named by the President, and judges are either elected directly by the people or are appointed by elected officials. Voting ballots are unsigned and marked by the voters in private booths so that no one else can find out for whom a citizen is voting. Public officials may be removed from office for failing to perform their duties properly as well as for serious violations of law.
单选题The passage warns of which of the following dangers?ACompanies in the United States may receive no protection from imports unless they actively seek protection from import competition.BCompanies that seek legal protection from import competition may incur legal costs that far exceed any possible gain.CCompanies that are United States owned but operate internationally may not be eligible for protection from import competition under the laws of the countries in which their plants operate.DCompanies that are not United States owned may seek legal protection from import competition under United States import relief laws.
单选题When crossing a front,isobars tend to（）.Achange from smooth curves within the air mass to sharp bends at the frontBchange from sharp bends within the air mass to smooth curves at the frontCpass smoothly across the front with no changeDbecome closer together at the front and pass through in straight lines
单选题Questions 21 to 25 are based on the following passage. Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining. In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States. In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline. Many scientists had believed that the lead would stay in soil and snow for a longer period. The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected. Scientists say both studies demonstrate that certain parts of the ecosystem (生态系统) respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute.The authors of the Ambio study have found that（）Aforests get rid of lead pollution faster than expectedBlead accumulations in forests are more difficult to deal withClead deposits are widely distributed in the forests of the USDthe upper layers of soil in forests are easily polluted by lead emissions
单选题If you are sailing from the East Coast of the United States to the Caribbean Sea，which publication would contain information on weather，currents，and storms?（）ASailing Charts of the Caribbean SeaBPilot Charts of the North AtlanticCLight Lists，Atlantic and Gulf CoastDTidal Current Tables
单选题Questions 21 to 25 are based on the following passage. Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining. In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States. In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline. Many scientists had believed that the lead would stay in soil and snow for a longer period. The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected. Scientists say both studies demonstrate that certain parts of the ecosystem (生态系统) respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute.The study published in the journal Nature indicates that （）Athe Clean Air Act has not produced the desired resultsBlead deposits in arctic snow are on the increaseClead will stay in soil and snow longer than expectedDthe US is the major source of lead pollution in arctic snow
单选题Questions 21 to 25 are based on the following passage. Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining. In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States. In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline. Many scientists had believed that the lead would stay in soil and snow for a longer period. The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected. Scientists say both studies demonstrate that certain parts of the ecosystem (生态系统) respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute.It can be inferred from the last paragraph that scientists （）Aare puzzled by the mystery of forest pollutionBfeel relieved by the use of unleaded gasolineCstill consider lead pollution a problemDlack sufficient means to combat lead pollution
单选题Questions 21 to 25 are based on the following passage. Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining. In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States. In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline. Many scientists had believed that the lead would stay in soil and snow for a longer period. The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected. Scientists say both studies demonstrate that certain parts of the ecosystem (生态系统) respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute.Lead accumulation worldwide decreased significantly after the use of unleaded gas in the US （）Awas discouragedBwas enforced by lawCwas prohibited by lawDwas introduced
单选题A mountain chain in the eastern United States, extending from the valley of the St. Lawrence River in Quebec, Canada, to the coastal plain of the Gulf of Mexico in Alabama, is _____.AAppalachian MountainsBRocky MountainsCHimalayan MountainsDGreen Mountains
单选题From the beginning of this passage we know that.Amost of the American states were prohibited to take a restBthe United States of America prohibited others from restCthe United States of America prohibited alcohol salesDmost states in the country began to allow alcohol sales
单选题By the end of last week 611 people from 49 countries _____ to attend the meeting, with nearly half coming from the United States, Germany and Britain.Ahad registeredBhave registeredCregisteredDwere registered
单选题According to the passage, the scientists carried out their researches on ______.Asmokers from different parts of the worldBsmokers from different states in the United StatesCactors and actresses who smoke a lotDwait staff and bartenders
填空题Air rushes toward the equator from the north and south because of the lower air pressure.____