题目内容
（请给出正确答案）
The heat released by burning oil and coal is the direct cause of global warming.
A．Right
B．Wrong
C．Not mentioned
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更多“The heat released by burning o…”相关的问题
The heat released by burning oil and coal is the direct cause of global warming.
A．Right
B．Wrong
C．Not mentioned
What is true about the greenhouse effect according to the passage？
A．It has been a disastrous process with earth for centuries.
B．Greenhouse gases prevent sunlight from reaching the earth and the heat from radiating back.
C．The greenhouse effect would never allow life to form.
D．The more greenhouse gases are released, the warmer the atmosphere will be.
听力原文： The average life of a hurricane is only about nine days, but it contains almost more power than we imagine. The energy in the heat released by a hurricane's rainfall in a single day would satisfy the entire electrical needs of the United States for more than six months. Water, not wind, is the main source of death and destruction in a hurricane. A typical hurricane brings 6- 12-inch downpours resulting in sudden floods. Worst of all is the powerful movement of the sea—the mountains of water moving toward the low-pressure hurricane center. The water level rises as much as 15 feet above normal as it moves toward shore.
(26)
A．6.
B．9.
C．12
D．15
Plant Gas
Scientists have been studying natural sources of methane (甲烷，沼气) for decades but hadn't regarded plants as a producer, notes Frank Keppler, a geochemist(地球化学家) at the Max Planek Institute for Nuclear Physics in Heidelberg, Germany. Now Keppler and his colleagues find that plants, from grasses to trees, may also be sources of the greenhouse gas. This is really surprising, because most scientists assumed that methane production requires an oxygen-free environment.
Previously, researchers had thought that it was impossible for plants to make significant amounts of the gas. They had assumed that microbes(微生物) need to be in environments without oxygen to produce methane. Methane is a greenhouse gas, like carbon dioxide. Gases such as methane and carbon dioxide trap heat in Earth's atmosphere and contribute to global warming.
In its experiments, Keppler's team used sealed chambers (室，房间；腔) that contained the same concentration of oxygen that Earth's atmosphere has. They measured the amounts of methane that were released by both living plants and dried plant material, such as fallen leaves.
With the dried plants, the researchers took measurement at temperatures ranging from 30 degrees Celsius to 70 degrees C..At 30 degrees C., they found, a gram of dried plant material released up to 3 nanograms(微克) of methane per hour (One nanogram is a billionth of a gram. ). With every 10-degree rise in temperature, the amount of methane released each hour roughly doubled.
Living plants growing at their normal temperatures released as much as 370 nanograms of methane per gram of plant tissue per hour. Methane emissions tripled (增加三倍) when living and dead plant was exposed to sunlight.
Because there was plenty of oxygen available, it's unlikely that the types of bacteria(bacterium 的复数，细菌) that normally make methane were involved. Experiments on plants that were grown in water rather than soil also resulted in methane emissions. That's another strong sign that the gas came from the plants and not soil microbes.
The new finding is an "interesting observation," says Jennifer Y.King, a biogeochemist(生物地球化学家) at the University of Minnesota in St. Paul. Because some types of soil microbes consume methane, they may prevent plant-produced methane from reaching the atmosphere. Field tests will be needed to assess the plant's influence, she notes.
What was scientists' understanding of methane？
A．It was produced from plants.
B．It was not a greenhouse gas.
C．It was produced in oxygen-free environments.
D．It traps more heat than any other greenhouse gas.
Plant Gas
Scientists have been studying natural sources of methane for decades but hadn't regarded plants as a producer, notes Frank Keppler, a geochemist at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. Now Keppler and his colleagues find that plants, from grasses to trees, may also be sources of the greenhouse gas. This is really surprising, because most scientists assumed that methane production requires an oxygen-free environment.
Previously, researchers had thought that it was impossible for plants to make significant mounts of the gas. They had assumed that microbes need to be in environments without oxygen to produce methane. Methane is a greenhouse gas, like carbon dioxide. Gases such as methane and carbon dioxide trap heat in Earth's atmosphere and contribute to global warming.
In its experiments, Keppler's team used sealed chambers that contained the same concentration of oxygen that Earth's atmosphere has. They measured the amounts of methane that were released by both living plants and dried plant material, such as fallen leaves.
With the dried plants, the researchers took measurement at temperatures ranging from 30 degrees Celsius to 70 degrees C. At 30 degrees C, they found, a gram of dried plant material released up to 3 nanograms of methane per hour. (One nanogram is a billionth of a gram. ) With every 10-degree rise in temperature, the amount of methane released each hour roughly doubled.
Living plants growing at their normal temperatures released as much as 370 nanograms of methane per gram of plant tissue per hour. Methane emissions tripled when living and dead plant was exposed to sunlight.
Because there was plenty of oxygen available, it's unlikely that the types of bacteria that normally make methane were involved. Experiments on plants that were grown in water rather than soil also resulted in methane emissions. That's another strong sign that the gas came from the plants and not soil microbes.
The new finding is an "interesting observation," says Jennifer Y. King, a biogeochemist at the University of Minnesota in St. Paul. Because some types of soil microbes consume methane, they may prevent plant-produced methane from reaching the atmosphere. Field tests will be needed to assess the plant's influence, she notes.
What was scientists' understanding of methane？
A．It was produced from plants.
B．It was not a greenhouse gas.
C．It was produced in oxygen-free environments.
D．It traps more heat than any other greenhouse gas.
Plant Gas
Scientists have been studying natural sources of methane for decarlesd but hadn’t regarded plants as a produeer，notes Frank Keppler，a geochemist at the Max Planck Institute for Nuelear Physics in Heldelberg，Germany1 ． Now Keppler and his colleagues nnd that plants，from grasses to trees，may also be sources of the greenhouse gas． This is really surprising，hecause most scientists assumed that methane production requires an oxygen—free environment．
Previously，researchers had thought that it was impossible for plants t0 make significant amounts of the gas． They had assumed that microhes2 need t0 he in environments without oxygen to prodnee methane． Methane is a greenhouse gas．1ike carbon dioxide． Gases sueh as methane and carhon dioxide trap heat in Earth’s atmosphere and contn‘hute to glohal warming．
In its experiments，Keppler’s team used sealed chambers that contained the same concentration of oxygen that Earth’s atmosphere has．They measured the amounts of methane that were released by both living plants and dried plant material，such as fallen leaves．
With the dried plants，the researchers took measurement at temperatures ranging from 30 degrees Celsius to 70 degrees C．At 30 degrees C，they found，a gram of dried plant material released up to
3 nanograms of methane per hour．One nanogram is a billionth of a gram．）With every 10-degree rise in temperature．the amount of methane released each hour roughly doubled．
Living plants growing at their normal temperatures released as much as 370 nanograms of meth’ane per gram of plant tissue per hour．Methane emissions tripled when living and dead plant was ex。posed to sunlight．
Because there was plenty of oxygen available，it’s unlikely that the types of bacteria that normally make methane were involved．Experiments on plants that were grown in water rather than soil also resulted in methane emissions．That’s another strong sign that the gas came from the plants and not soil microbes．
The new finding is an“interesting observation，”says Jennifer Y．King，a biogeochemist at the University of Minnesota in St．Paul3．Because some types of soil microbes consum~’methane，they may prevent plant-produced methane from reaching the atmosphere．Field tests will be needed to assess the plant’s influence，she notes．
第 36 题 What was scientists’understanding of methane？
A．It was produced from plants．
B．It was not a greenhouse gas．
C．It was pmduced in OXygen－free environments．
D．It traps more heat than any other greenhouse gas．
【C1】
A．nature
B．fact
C．research
D．addition
请根据短文内容，回答题。
Plant Gas
Scientists have been studying natural sources of methane for decades but hadn&39;t regarded plants as a producer, notes Frank Keppler, a geochemist at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. Now Keppler and his colleagues find that plants, from grasses to trees, may also be sources of the greenhouse gas. This is really surprising, because most scientists assumed that methane production requires an oxygen-free environment.＜br＞
Previously, researchers had thought that it was impossible for plants to make significant amounts of the gas. They had assumed that microbes need to be in environments without oxygen to produce methane. Methane is a greenhouse gas, like carbon dioxide. Gases such as methane and carbon dioxide trap heat in Earth&39;s atmosphere and contribute to global warming.＜br＞
In its experiments, Keppler&39;s team used sealed chambers that contained the same concentration of oxygen that Earth&39;s atmosphere has. They measured the amounts of methane that were released by both living plants and dried plant material, such as fallen leaves.＜br＞
With the dried plants, the researchers took measurement at temperatures ranging from 30 degrees Celsius to 70 degrees C. At 30 degrees C, they found, a gram of dried plant material released up to 3 nanograms of methane per hour. (One nanogram is a billionth of a gram.) With every 10-degree rise in temperature, the amount of methane released each hour roughly doubled.＜br＞
Living plants growing at their normal temperatures released as much as 370 nanograms of methane per gram of plant tissue per hour. Methane emissions tripled when living and dead plant was exposed to sunlight.＜br＞
Because there was plenty of oxygen available, it&39;s unlikely that the types of bacteria that normally make methane were involved. Experiments on plants that were grown in water rather than soil also resulted in methane emissions. That&39;s another strong sign that the gas came from the plants and not soil microbes.＜br＞
The new finding is an "interesting observation," says Jennifer Y. King, a biogeochemist at the University of Minnesota in St. Paul. Because some types of soil microbes consume methane, they may prevent plant-produced methane from reaching the atmosphere. Field tests will be needed to assess the plant&39;s influence, she notes.
What was scientists‘ understanding of methane？ 查看材料
A.It was produced from plants
B.It was not a greenhouse gas
C.It was produced in oxygen-free environments
D.It traps more heat than any other greenhouse gas
