What suggestion would you like to give to a child who is starting school for the first time? Use reasons and specific examples to explain why this suggestion is important.
Some people believe that first-year college students should live in a dorm building that homes only freshmen. Others may prefer the idea that first-year students must live together with students in 2nd, 3rd, or even 4th grade. Which opinion do you agree with? Explain why.
2)建议答题思路：比如选择first-year college students should live in a dorm building that homes only freshmen;理由一：freshmen are too vunarable to be affected since they are too young and we can't make sure the influence from the older grades is positive or negative ;理由二：they share more in common.
1. What does the woman hope to find out by going to the art museum?
A. What types of volunteer positions are available for students
B. How much she would be paid for working as a tour guide
C. Whether alternative arrangements can be made for becoming a tour guide
D. Why a particular museum employee has not returned her phone calls
2. Why does the woman mention a test that she has to take?
A. To explain why she is unable to attend a training session
B. To let the man know that she will be late for the tour on Monday
C. To list one requirement she must fulfill to receive extra credit
D. To show that she is aware of what she must do to become a tour guide
3. Why does the woman want to start working at the art museum before the current semester ends?
A. To fulfill a graduation requirement
B. To improve her grade in a class
C. To earn money for the following semester
D. To conduct research for a paper
4. What does the man imply when he mentions Professor Tyler?
A. That he is familiar with the situation the woman is in
B. That the training session for new tour guides covers some of the same material covered in art history classes
C. That Professor Tyler recognizes which students would make good tour guides
D. That Professor Tyler may have given the woman incorrect information about the job
5. According to the man, why might the woman want to consider a data processing position Click on 2 answers.
A. It is probably more exciting than working as a tour guide.
B. It would allow the woman to begin working immediately.
C. It would give the woman experience in her major.
D. It could eventually lead to a paying job.
类别：地质类 真题 140628CN-P3
Title：Earth’s Energy Cycle
To understand most of the processes at work on Earth, it is useful to envisage interactions within the Earth system as a series of interrelated cycles. One of these is the energy cycle, which encompasses the great ―engines‖—the external and internal energy sources—that drive the Earth system and all its cycles. We can think of Earth’s energy cycle as a ―budget‖: energy may be added to or subtracted from the budget and may be transferred from one storage place to another, but overall the additions and subtractions and transfers must balance each other. If a balance did not exist, Earth would either heat up or cool down until a balance was reached. The total amount of energy flowing into Earth’s energy budget is more than 174,000 terawatts (or 174,000 ×10¹² watts). This quantity completely dwarfs the 10 terawatts of energy that humans use per year. There are three main sources from which energy flows into the Earth system.
Incoming short-wavelength solar radiation overwhelmingly dominates the flow of energy in Earth’s energy budget, accounting for about 99.986 percent of the total. An estimated 174,000 terawatts of solar radiation is intercepted by Earth. Some of this vast influx powers the winds, rainfall, ocean currents, waves, and other processes in the hydrologic (or water) cycle. Some is used for
photosynthesis and is temporarily stored in the biosphere in the form of plant and animal life. When plants die and are buried, some of the solar energy is stored in rocks, when we burn coal, oil, or natural gas, we release stored solar energy.
The second most powerful source of energy, at 23 terawatts or 0.013 percent of the total, is geothermal energy, Earth’s internal heat energy. Geothermal energy eventually finds its way to Earth’s surface, primarily via volcanic pathways. It drives the rock cycle and is therefore the source of the energy that uplifts mountains, causes earthquakes and volcanic eruptions, and generally shapes the face of the Earth.
The smallest source of energy for Earth is the kinetic (motion) energy of Earth’s rotation. The Moon’s gravitational pull lifts a tidal bulge in the ocean; as Earth spins on its axis, this bulge remains essentially stationary. As Earth rotates, the tidal bulge runs into the coastlines of continents and islands, causing high tides. The force of the tidal bulge piling up against land masses acts as a very slow brake, actually causing Earth’s rate of rotation to decrease slightly. The transfer of tidal energy accounts for approximately 3 terawatts, or 0.002 percent of the tidal energy budget.Earth
loses energy from the cycle in two main ways: reflection, and degradationand reradiation. About 40 percent of incoming solar radiation is simply reflected, unchanged, back into space by the clouds, the sea, and other surfaces. For any planetary body, the percentage of incoming radiation that is reflected is called the ―albedo. Each different material has a characteristic reflectivity. For example, ice is more reflectant than rocks or pavement; water is more highly reflectant than vegetation; and forested land reflects light differently than agricultural land. Thus, if large expanses of land are converted from forest to plowed land, or from forest to city, the actualreflectivity of Earth’ssurface, and hence its albedo, may be altered. Any change in albedo will, of course, have an effect on Earth’s energy budget.
The portion of incoming solar energy that is not reflected back into space, along with tidal and geothermal energy, is absorbed by materials at Earth’s surface, in particular the atmosphere and hydrosphere. This energy undergoes a series of irreversible degradations in which it is transferred from one reservoir to another and converted from one form to another. The energy that is absorbed, utilized, transferred, and degraded eventually ends up as heat, in which form it is reradiated back into space as long-wavelength (infrared) radiation. Weather patterns are a manifestation of energy transfer and degradation.
To understand most of the processes at work on Earth, it is useful to envisage interactions within the Earth system as a series of interrelated cycles. One of these is the energy cycle, which encompasses the great ―engines‖—the external and internal energy sources—that drive the Earth system and all its cycles. We can think of Earth’s energy cycle as a ―budget‖: energy may be added to or subtracted from the budget and may be transferred from one storage place to another, but overall the additions and subtractions and transfers must balance each other. If a balance did not exist, Earth would either heat up or cool down until a balance was reached.
Do you agree or disagree with the following statement: Children can benefit in important ways from taking care of a pet animal. Use specific reasons and examples to support your answer
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