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Owing to the climate change, people are easier to be infected.
A．Y
B．N
C．NG
答案
更多“Owing to the climate change, people are easier to be infected.A．YB．NC．NG”相关的问题
第1题
听力原文： The climate of the west coast is the most moderate in Canada. Summers are coast and fairly dry and winters are mild, cloudy and wet. Even in mid-winter, average temperatures are usually above freezing.
The central plain from the Rocky Mountains to Great Lakes is characterized by cold winters, short but hat summers, and light snow and rain.The large water-surfaces of Central and Eastern Canada produce considerable modification in the climate. Southern Ontario and Quebec experience cold, damp winters and hot, humid summers.
Most of Atlantic Canada has a humid climate owing to its marine character. Nevertheless, it experiences weather systems arriving from the dry continental interior as well as from the sea. The combined influence of these systems creates some of the most variable day-to-day weather conditions to be encountered anywhere in Canada.
The north-central part of Canada is usually snow-covered for more than half of the year, with a frost flee period of barely two months. Rain is relatively light. Further north, on the islands along the Arctic coast and round Hudson Bay, the land is always frozen. Average temperatures stay above freezing for only a few weeks of the year. The Arctic Islands and the northern border of the mainland do not have a summer season of the kind known in Southern Canada.
(33)
A．The Arctic coast.
B．The west coast.
C．The east coast.
D．The central plain.
第2题
听力原文： The climate of the west coast is the most moderate in Canada. Summers are cool and fairly dry and winters are mild, cloudy and wet. Even in mid-winter, average temperatures are usually above freezing.
The central plain from the Rocky Mountains to Great Lakes is characterized by cold winters, short but hot summers, and light snow and rain. Tile large water-surfaces of Central and Eastern Canada produce considerable modification in the climate. Southern Ontario and Quebec experience cold, damp winters and hot, humid summers.
Most of Atlantic Canada has a humid climate owing to its maritime character. Nevertheless, it experiences weather systems arriving from the dry, continental interior as well as from the sea. The combined influence of these systems creates some of the most variable day-to-day weather conditions to be encountered anywhere in Canada.
The north-central part of Canada is usually snow-covered for more than half of the year, with a frost-free period of barely two months. Rain is relatively light. Further north, on the islands along the Arctic coast and round Hudson Bay, the land. is always frozen. Average temperatures stay above freezing for only a few weeks of the year. The Arctic Islands and the northern border of the mainland do not have a summer season of the kind known in Southern Canada.
(33)
A．The Arctic coast.
B．The west coast.
C．The east coast.
D．The central plain.
第3题
There are approximately three quarters of a ton of termites (白蚁) for every person on Earth. It now turns out that these critters may be helping to alter the climate and affect man's life.
For years scientists have been saying that carbon dioxide sent into the atmosphere by the burning of fuels might lead to the rise in temperatures of the whole earth, owing to the greenhouse effect in which the gas prevents the escape of heat into outer space. Now an international team of researchers has discovered that termites generate more than twice the carbon dioxide that fuel burning does. And this production, which comes from the insects' eating and consuming of different kinds of vegetables and wood, has risen greatly. This is chiefly because man has cut so many trees in order to open more land and thus has provided large quantities of food for the insects in the form. of tiny pieces of wood.
The output from the burning of fuels is of greater concern, however, because it is continuing to rise steadily and so far no effective measures have been taken to reduce the amount of carbon elements in this way. Production by termites, on the other hand, is not likely to increase much more.
From the passage we know that" the greenhouse effect" is an effect in which ______ .
A．low temperatures are created by using a house
B．the house is made green in order to keep heat
C．heat is prevented from escaping outside
D．everything is kept green in a house
第4题
2. The relentless accumulation of greenhouse gases has led the IPCC to project that in the next hundred years average global temperatures will rise by 1 to 3.5 degrees C. That may not
seem like much. Yet the "little ice age," an anomalous cold snap that peaked from 1570 to 1730 and forced European farmers to abandon their fields, was caused by a change of only half a degree.
3. The compeer models used to project greenhouse effects far into the future are still being improved to accommodate a rapidly growing font of knowledge. And it is remarkably difficult to detect a definitive "signature" of human activity in the world's widely fluctuating climate record. To project future climate patterns, scientists use computer simulations of the interactions among land, air, water, ice and sunlight. These general circulation models, or GCMs, consist of equations representing the known laws of atmospheric physics and ocean circulation. For each section of the planet, they calculate the effect of such factors as air temperature, the Earth's rotation, surface friction at sea level, rainfall, and other climatic conditions. A perfect model, if given enough information about conditions on Earth several hundred years ago, could provide an exact description of today's climate. Only very recently have models been developed that are capable of realistically depicting the present global climate without a lot of tinkering— adjustments often called "fudge factors."
4. In part, this is because only the most powerful computers are fast enough to handle the job, and in part because some aspects of climate change are still mysterious. Even avid proponents caution that GCMs are not yet trustworthy for predicting detailed effects in individual regions: Models divide the world's surface into grids that are typically about 200 miles on a side, but ocean eddies, storms and cloud activity take place on far smaller scales. The modelers, therefore, have to compensate with approximations. According to Kevin Trenberth, chief climate analyst at the National Center for Atmospheric Research in Boulder, Colorado, all GCMs project global warming, but they can provide only a range of projected temperature change.
5. The role of clouds and airborne suspended particles called aerosols is no easier to factor into models. Clouds shade the Earth's surface, promoting cooling. But, depending on their altitude, density, and other conditions, they can also trap outgoing heat, promoting warming. Aerosols are also equally tricky. Some encourage water vapor in the air to condense into tiny droplets. The resulting clouds are dense and shiny, shading the surface for weeks. Thus, ironically, our own pollution, mainly from combustion of sulfur-bearing coal and oil, may temporarily have spared us some effects of global warming.
6. Yet the warming could be part of the natural roller coaster of average global air temperatures, which have varied by as much as 6 degrees C during the past 150,000 years. Climate fluctuates over thousands of years owing to periodic changes in the sun's energy output and in the Earth's orbit and tilt, both of which influence the amount and intensity of sunlight reaching the surface. Proof of these climate shifts comes from variations in the composition of ice extracted in cores from the depths of ancient glaciers in Greenland and Antarctica and from differences among marine organisms in sediment cores taken from the s
