问答题For the last fifty years, the globe has been warming (1)____. It is true that the average temperature (2) r____is only about two degrees, but that has been enough to start the glaciers (3)____(recede) in many parts of the world. A rise of one degree per generation is a large increase. Nature seldom moves as swiftly as this. We may have been helping her. To a very large (4)____, the temperature of the Earth is determined by the amount of solar heat which the atmosphere can (5) ke____ . The air above us sets like the glass in a greenhouse, trapping many of the heat waves which would (6)____bounce back into space. Carbon dioxide in the air is mostly responsible (7)____the “greenhouse effect”; it is a gas produced by all our countless fires, furnaces and internal combustion engines. The end of the short-lived age of fossil fuels is already in (8) si____ ; soon in one or two centuries at the most we will have wasted all the world’s resource of oil and coal. This no longer means disaster, for (9)____(atom) energy has arrived in time to save our civilization from dying through lack of power. We are moving into a brighter and cleaner age, as the smoke of millions of fire and furnaces and automobiles ceases to (10)____(dark) the sky. But for that very reason, it may also be a colder age.
问答题
For the last fifty years, the globe has been warming (1)____. It is true that the average temperature (2) r____is only about two degrees, but that has been enough to start the glaciers (3)____(recede) in many parts of the world. A rise of one degree per generation is a large increase. Nature seldom moves as swiftly as this. We may have been helping her. To a very large (4)____, the temperature of the Earth is determined by the amount of solar heat which the atmosphere can (5) ke____ . The air above us sets like the glass in a greenhouse, trapping many of the heat waves which would (6)____bounce back into space. Carbon dioxide in the air is mostly responsible (7)____the “greenhouse effect”; it is a gas produced by all our countless fires, furnaces and internal combustion engines. The end of the short-lived age of fossil fuels is already in (8) si____ ; soon in one or two centuries at the most we will have wasted all the world’s resource of oil and coal. This no longer means disaster, for (9)____(atom) energy has arrived in time to save our civilization from dying through lack of power. We are moving into a brighter and cleaner age, as the smoke of millions of fire and furnaces and automobiles ceases to (10)____(dark) the sky. But for that very reason, it may also be a colder age.
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