更多"[单选题]The smog is due（ ）invisible g"的相关试题:
[不定项选择题]共用题干
The Smog（烟雾）
For over a month,Indonesia was in crisis.Forest fires raged out of control as the
country suffered its worst drought for 50 years.Smoke from the fires mixed with sunlight and
hot dry air to form a cloud of smog.This pollution quickly spread and within days it was
hanging over neighbouring countries including Malaysia,Singapore and Thailand.
When the smoke combined with pollution from factories and cars,it soon became
poisonous（有毒的）.Dangerous amounts of CO became trapped under the smog and
pollution levels rose. People wheezed（喘息）and coughed as they left the house and their
eyes watered immediately.
The smog made it impossible to see across streets and whole cities disappeared as
grey soot（烟灰） covered everything. In some areas, water was hosed（用胶管浇）from
high-rise city buildings to try and break up the smog.
Finally,heavy rains,which came in November,put out the fires and cleared the air.
But the environmental costs and health problems will remain.Many people from South-
Eastern Asian cities already suffer from breathing huge amounts of car exhaust fumes（汽车
排放的废气）and factory pollution. Breathing problems could well increase and many non-
sufferers may have difficulties for the first time.Wildlife has suffered too.In lowland
forests,elephants,deer,and tigers have been driven out of their homes by smog.
But smog is not just an Asian problem.In fact,the word was first used in London in
1 905 to describe the mixture of smoke and thick fog.Fog often hung over the capital.
Sometimes the smog was so thick and poisonous that people were killed by breathing
problems or in accidents.About 4, 000 Londoners died within five days as a result of thick
smog in 1952.
The word"smog"first appeared in 1952.
A.Right
B.Wrong
C.Not mentioned
[不定项选择题]共用题干
The Smog（烟雾）
For over a month,lndonesia was in crisis.Forest fires raged out of control as the
country suffered its worst drought for 50 years.Smoke from the fires mixed with sunlight and
hot dry air to form a cloud of smog.This pollution quickly spread and within days it was
hanging over neighbouring countries including Malaysia,Singapore and Thailand.
When the smoke combined with pollution from factories and cars,it soon became
poisonous（有毒的）.Dangerous amounts of CO became trapped under the smog and
pollution levels rose. People wheezed（喘息）and coughed as they left the house and their
eyes watered immediately.
The smog made it impossible to see across streets and whole cities disappeared as
grey soot（烟灰）covered everything. In some areas, water was hosed（用胶管浇）from
high-rise city buildings to try and break up the smog.
Finally,heavy rains,which came in November,put out the fires and cleared the air.
But the environmental costs and health problems will remain.Many people from South-
Eastern Asian cities already suffer from breathing huge amounts of car exhaust fumes（汽车
排放的废气）and factory pollution. Breathing problems could well increase and many non-
sufferers may have difficulties for the first time.Wildlife has suffered too.In lowland forests,elephants,deer,and tigers have been driven out of their homes by smog.
But smog is not just an Asian problem.In fact,the word was first used in London in
1905 to describe the mixture of smoke and thick fog.Fog often hung over the capital.
Sometimes the smog was so thick and poisonous that people were killed by breathing
problems or in accidents.About 4, 000 Londoners died within five days as a result of thick
smog in 1952.
The word"smog"first appeared in 1952.
A.Right
B.Wrong
C.Not mentioned
[单选题]Sales of new homes this month are down 2% from last month, ( ) 6% from a year ago.
A. too
B. and
A.
B.as well
C.
D.along with
[不定项选择题]共用题干
Where Did the Earth's Water Come From?
Earth is located within the"snow line"of the solar system,the region closest to the Sun where H2 0 is primarily in liquid or gaseous form,if at all.______(46)The snow line phenomena is reflected in the water content of planets like Mercury,Venus,and Mars. Water is absent on Mercury.On Venus,H2O only exists as a trace element in the atmosphere.Mars only has a thin veneer of ice in its polar regions.In general,water is rare within the snow line.
Why does Earth have so much water relative to the other inner planets?71%of the surface is covered in the oceans,more than half of which is deeper than 3,000 meters,with an approximate total volume of 1.3 billion cu km.______(47)
There are various theories as to where all the Earth's water came from,but several theories have fared better than the others.______(48)When the Earth was in the process of forming,with a radius just 40%smaller than at present,it would have had enough gravity to hold on to a tenuous atmosphere with water vapor. The first water vapor on the planet would have come from the planet's internals,where volatile(low weight)chemicals would have a tendency to float to the top,and heavy chemicals(iron and nickel)would sink.
Though the first of Earth's water came about through volcanism,this alone probably didn't produce enough to form stable pools on the surface.______(49)Comparing the isotope ratios of water on Earth and water from comets and asteroids has revealed that the majority of the Earth's water comes from asteroids.
Throughout its history,Earth's water has increased in volume due to biological processes. In the early seas of Earth,hydrogen sulfide would have been in great supply,which,when reacted with carbon dioxide from the atmosphere during photosynthesis in sulfide-reducing bacteria,would have produced hydrogen,sulfur,and water.______(50)
________（50）
A.More water was added to the planet during several hypothesized large impacts from asteroids from the outer asteroid belt.
B.We know that the oceans existed as early as 100 million years after the formation of the Earth.
C.Still,the oceans only make up 0.023%of the Earth's total mass.
D.Astronomers say Earth s water may have come from space.
E.The snow line is located in the outerasteroid belt,between the orbits of Mars and Jupiter.
F.Many geologists believe that the majority of Earth's water generated through this process.
