Global warming is already cutting substantially into potential crop yields in some countri
【C1】
A.decreases
B.reductions
C.increases
D.additions
【C1】
A.decreases
B.reductions
C.increases
D.additions
A.the coming of ice age
B.more Katrina-like or worse hurricanes
C.less intense hurricanes
D.more greenhouse gases in the atmosphere
Questions are based on the following passage.
In fact, even without humans, the Earth"s climate changes.Some climate change is(36)But,as greenhouse gases are added to the atmosphere, human influence "emerges" from natural variability.Droughts, one of the most Intensely studied climate events, are a perfect example of an(37)with both natural and human influences.Separating the(38)strengths of the influences is a challengefor scientists.However, with the large social and economic costs of droughts, it is a challenge thescientists must(39).
In a very recent study published in the Journal of Climate, authors Richard Seager and MartinHoerling cleverly used climate models forced by sea surface temperatures to(40)how much of thepast century"s North American droughts have been caused by ocean temperatures, natural variability and human influences.
Droughts can be caused by a (n)(41)of separate or interactional phenomena.At its root,drought results from the low(42)of water falling and sometimes higher temperatures (which increaseevaporation rates).The beginning of drought can often be linked to variations in ocean temperatures.
It is also found that the oceans can affect the atmosphere to create conditions that are(43)responsible for drought.What"s more, temperature increases(44)withhuman-driven global warmingalso play a role.This(45)agrees with other researchers who have shown that, while human-emittedgreenhouse gas warming may not cause a particular drought, it can make drought come on earlier,faster, and harder than it otherwise would.
A.associated
B.attached
C.conclusion
D.conduct
E.distinguish
F.effect
G.natural
H.Partly
I.Quality
J.Quantity
K.Relative
L.Ridiculous
M.Simply
N.Undertake
O.variety
第(36)题应填__________ 查看材料
Temperatures at Hudson Bay have risen by one half degree Fahrenheit every decade since 1950. Winter ice on the bay melts three weeks earlier than it did just 25 years ago, which means three fewer weeks of polar bear mealtime. Result: Polar bears are 10 percent thinner and produce 10 percent fewer cubs than they did 20 years ago. And though climatologists hotly debate the causes behind Earth's Arctic meltdown, "these changes are startling and unexpected,' says James McCarthy, co-leader of the United Nations Intergovernmental Panel on Climate Change.
The plight of polar bears is just the tip to the iceberg when it comes to mounting evidence of global warming. "There's definitely a stark contrast with the way things were at the start of the 20th century," says atmospheric scientist Leonard Druyan, of Columbia University. Recent data show the volume of Arctic sea ice has shrunk 20 percent since the 1950s; glaciers around the world are melting at rapidly increasing rates. Rivers and lakes in North America, Asia, and Europe now freeze about nine days later and thaw 10 days earlier than they did a century ago.
Most scientists believe the only effective strategy to halt global warming is to drastically reduce emissions of powerful air pollutants like carbon dioxide, which accounts for two-thirds of all greenhouse gases. In the last 150 years, the surging use of fossil fuels coal, oil, and natural gas -- has released 270 billion tons of carbon into the air in the form. of carbon dioxide. Fortunately, oceans, plants, and soils absorb more than half of all atmospheric carbon dioxide -- without them world temperatures might have already soared at an alarming rate.
By saying "Spring is usually prime food time for 1,200 polar bears"? (Line I, Para. 1), the author means that ______.
A.spring is usually a good time for polar bears to carry out their mating rituals
B.the polar bears usually eat a lot in the spring
C.spring is generally a good time to hunt polar bears
D.polar bears usually hibernate in the spring
Mr. Wang, a retired worker, was echoing the feelings of thousands of Beijing people as summer entered its hottest stage.
Thursday was the hottest day of the year so far, with the temperature officially reported as 36 degrees. But many people believe the government understates the real figure because regulations (条例 ) passed in the 1950s allow workers to stay at home for all or half day if the temperature is higher than 38 degrees.
" It was at least 40 degrees on Thursday, " said Liang Guojun, a middle school teacher. " It was unbearable. But the newspaper said only 36 and forecast rain. Of which there was none.
In Beijing, visitors to Daguanyuan Park in the southwest of the city said the ground temperature reached 55 degrees on Thursday.
The Beijing Evening News reported yesterday that more than 3 , 000 people had been admitted to hospitals suffering from heat stroke (中暑) , while local power companies were struggling to meet the demand for electricity.
A heat wave is sweeping much of the mainland, with temperatures in parts of Beijing, Shandong and Hebei provinces reaching as high as 39 degrees. Xinhua said the average temperature in Beijing on Thursday was 36 degrees but in the northern part of Tanghe Kou it was 39 degrees.
Hundreds of people suffering fevers were treated at hospitals. The Chaoyang hospital in northeast Beijing reported 55 such cases on Wednesday. They said most were caused by the difference in temperature between air-conditioned areas and outdoors.
Mr. Liang said the regulation on stopping work when the temperature reached 38 degrees was passed in the 1950s when Beijing had no air-conditioning and depended on fans—either handheld or electric.
"But in those days the temperature rarely reached 38 degrees, so the rule was not actually used. Now we have had years of global warming and industrial pollution and the summers get hotter each year, which means that the temperature is often higher than 38.
But an official from the Beijing Meteorological Observatory (北京气象台) said they had no knowledge of any such regulation.
Whom does the underlined word "they" (Paragraph 1) refer to?
A.Bus drivers.
B.Weather reports.
C.Newspaper editors.
D.Passengers on the bus.
A.Middle Market
B.Global Commercial Channel
C.onsumer &Small Middle Business
D.Public& Large Enterprise
A.set expir
B._logs- days= 120
C.set global expir
D.logs- days= 120
E.set expire- logs- dlays=5
F.F.set global expire-_ Jogs- days=5