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[主观题]

The heat released by burning oil and coal is the direct cause of global warming.A.RightB.W

The heat released by burning oil and coal is the direct cause of global warming.

A.Right

B.Wrong

C.Not mentioned

答案
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更多“The heat released by burning oil and coal is the direct cause of global warming.A.RightB.W”相关的问题

第1题

The heat released by burning oil and coal is the direct cause of global warming. A

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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第2题

A ______ is one whereby water is released as rainfall, generating heat, and causes water v
apour to be pulled into the storm to replace it.

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第3题

What is true about the greenhouse effect according to the passage?A.It has been a disastro

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.

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第4题

听力原文:The average life of a hurricane is only about nine days, but it contains almost m

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

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第5题

Plant GasScientists have been studying natural sources of methane (甲烷,沼气) for decades

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.

点击查看答案

第6题

Plant GasScientists have been studying natural sources of methane for decades but hadn't r

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.

点击查看答案

第7题

Plant Gas Scientists have been studying natural sources of methane for decarlesd but h

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.

点击查看答案

第8题

A summary of the physical and chemical nature of life must begin, not on the Earth, but in
the Sun; in【C1】______at the Sun's very center. It is here that is to be found the【C2】______of the energy that the Sun pours out into space is【C3】______The energy takes the form. of light and heat. This energy is【C4】______at the center of the Sun as billions【C5】______billions of nuclei of hydrogen atoms【C6】______with each other and fuse together to form. nuclei of helium, and in doing so,【C7】______some of the energy that is【C8】______in the nuclei of atoms. The【C9】______of light and heat of the Sun【C10】______that some 600 million tons of hydrogen be【C11】______into helium(氦)in the Sun every second. This the Sun has been doing for several thousands of millions of years. The nuclear energy is released at the Sun's center as high-energy gamma radiation,【C12】______of electromagnetic radiation like light and radio waves, only of very much shorter【C13】______. This gamma radiation is absorbed by atoms inside the Sun to be【C14】______at slightly longer wavelengths. This radiation, in its【C15】______is absorbed and reemitted. As the energy filters through the【C16】______of the solar interior, it passes through the X-ray part of the spectrum【C17】______becoming light. At this stage, it has reached what we call the solar surface, and can escape into space without being absorbed further by solar atoms. A very small【C18】______of the Sun's light and heat is emitted in such directions that【C19】______passing unhindered through interplanetary space, it【C20】______the Earth.

【C1】

A.nature

B.fact

C.research

D.addition

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第9题

请根据短文内容,回答题。 Plant GasScientists have been studying natural sources of methane f

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

点击查看答案
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