The Earth’s irregular heating is caused by （）.
A . the time of day
B . the seasons
C . geography
D . All of the above
时间：2022-11-09 21:07:45
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The vertical component of the Earth’s magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation? （）
A . The Flinders bar
B . The heeling magnet
C . Quadrantal soft iron spheres
D . Bar magnets in the binnacle
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A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A . the equator
B . a loxodromic curve
C . a small circle
D . a meridia
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Generally speaking，you should expect to find low atmospheric pressure prevailing in the earth’s（）.
A . equatorial area
B . polar regions
C . mid-latitudes
D . All of the above
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A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A . the equator
B . a great circle
C . a small circle
D . a meridia
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The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
A . Pressure gradient
B . Coriolis effect
C . Aurora borealis
D . Ballistic deflectio
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The points on the earth’s surface where the magnetic dip is 90° are（）.
A . Along the magnetic equator
B . Connected by the isoclinal line
C . The isopors
D . The magnetic pole
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If a magnetic compass is not affected by any magnetic field other than the Earth’s，which statement is TRUE?（）.
A . Compass error and variation are equal
B . Compass north will be true north
C . Variation will equal deviation
D . There will be no compass error
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A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
A . Great circle
B . Equator
C . Small circle
D . Meridia
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Which organization assumed that the day, July 11, 1987, was World Population Day, on which the earth’s population has exceeded 5 billion?
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The earth ___the necessary amount of heat and light from the sun（）
A．supplies
B．receives
C．provides
D．requires
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The moon’s surface gravity is only about____as strong as the earth’s surface gravity.
A．one-six
B．one-sixth
C．six-one
D．one-sixst
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)is the orbit of a geosynchronous sateHite whose circular and direct orbit lies in theplane of the Earth’s equator, and it is approximately 35,786 kilometers above the equator.
A．Polarorbiting
B．GPSsatelliteorbk
C．Geostationarysatelliteorbit
D．ICOorbit
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It’s _____ knowledge that the earth moves around the sun.
A．common
B．unusual
C．strange
D．interesting
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Once out of the earth’s gravity, the astronaut is ________ by the problem of weightlessness.
A．effected
B．affected
C．relate
D．connected
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It can be learned from the passage that oil exploitation beneath ANWR' s frozen earth ______.
A．involves a lot of technological problems
B．remains a controversial issue
C．is expected to get under way soon
D．will enable the U.S. to be oil independent
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Recycling wastes slows down the rate ________ which we use up the Earth’s finite resources.
A) In
B) of
C) with
D) at
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The sun heats the earth, which makes it possible for living things to grow.
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Clouds（) much of the sun's heat back into space, making the earth cooler,
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Scientists have long believed one way to stop the Earth’s atmosphere from warming is by planting more trees. The idea is that more trees will take in or absorb some of the carbon dioxide in the atmosphere. Carbon dioxide is a gas released by cars, factories and other human activities. The gas traps heat in the Earth’s atmosphere, which warms the planet. However, two new studies have found that trees may not be as helpful in reducing carbon dioxide as had been thought.
The first study was done at Duke University in Durham, North Carolina. Researchers pumped extra carbon dioxide into a test area where pine trees were growing. The trees grew thirty-four percent faster during the first three years. However, in time, the trees slowed to about their normal growth rate. The scientists say this is because trees need other nutrients, such as nitrogen.
In the second study, researchers from Duke and Bowdoin College in Brunswick, Maine examined the soil around trees. They discovered that as the leaves broke down into the soil, all the carbon was not trapped in the soil. Much of it was released into the atmosphere as carbon dioxide.
The findings of the two studies were published last month in Nature magazine. They suggest there is limited value in planting trees to reduce the carbon dioxide pollution in the atmosphere.
Forest planting has been a part of negotiations on a world agreement to reduce greenhouse gases that scientists believe cause global warming. The United States, Canada, Japan and some other industrial countries have supported the idea. But this new research suggests the idea is not as effective as environmental activists had thought. Scientist Ram Oren of Duke University led the study on tree growth. He says that earlier estimates on the ability of forests to absorb carbon dioxide were overly hopeful.
Some scientists not involved in the studies say the research provides some of the first evidence on how trees react to carbon dioxide. Other scientists say the research disputes a belief among some coal and power companies. The companies say that rising levels of carbon dioxide in the atmosphere will not create harmful global warming. Instead, they say it will increase forests and other plants.
What is the purpose of this passage？
A．Introduce some new ideas about the relationship between trees and carbon dioxide.
B．Introduce recent condition of global industrial pollution.
C．Call on people to plant more trees to reduce greenhouse gases.
D．Point out that power companies should be responsible for the rising levels of carbon dioxide.
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The sun heats the earth, which makes it possible for plants to grow.
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4. Which statement is true about the earth’s movement？ A. The earth spins and travels around the sun at the same time. B. One day is the time it takes the earth to travel around the sun once. C. One year is the time it takes the earth to spin around once. D. It is impossible to measure the earth’s movement.
A、答案A
B、答案B
C、答案C
D、答案D
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The primary cause of all changes in the Earth’s weather is
A．Variation of solar energy received by the Earth
B．Changes in air pressures over the Earth’s surface
C．Movement of the air masses
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（）is the orbit of a geosynchronous satellite whose circular and direct orbit lies in the plane of the Earth’s equator,and it is approximately 35,700 kilometers above the equator
A．Polar Orbiting
B．GPS Satellite Orbit
C．Geostationary Satellite Orbit
D．The North and South Poles
