托福阅读真题100篇原文+题目(八十七)
托福阅读中，无论是阅读速度还是解题技巧，亦或是长难句，每一种因素都会成为同学们阅读高分路上的重要障碍。因此，大家最好的备考方式，就是利用真题练习，从整体上来备考，这样有助于我们提高整体的阅读水平。为大家推荐的是托福阅读真题100篇，供大家练习。
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PASSAGE 87
Because the low latitudes of the Earth, the areas near the equator, receive more heat than the latitudes near the poles, and because the nature of heat is to expand and move, heat is transported from the tropics to the middle and high latitudes. Some of this heat is moved by winds and some by ocean currents, and some gets stored in the atmosphere in the form of latent heat. The term latent heat refers to the energy that has to be used to convert liquid water to water vapor. We know that if we warm a pan of water on a stove, it will evaporate, or turn into vapor, faster than if it is allowed to sit at room temperature. We also know that if we hang wet clothes outside in the summertime they will dry faster than in winter, when temperatures are colder. The energy used in both cases to change liquid water to water vapor is supplied by heat — supplied by the stove in the first case and by the Sun in the latter case. This energy is not lost. It is stored in water vapor in the atmosphere as latent heat. Eventually, the water stored as vapor in the atmosphere will condense to liquid again, and the energy will be released to the atmosphere.
In the atmosphere, a large portion of the Sun's incoming energy is used to evaporate water, primarily in the tropical oceans. Scientists have tried to quantify this proportion of the Sun's energy. By analyzing temperature, water vapor, and wind data around the globe, they have estimated the quantity to be about 90 watts per square meter, or nearly 30 percent of the Sun's energy. Once this latent heat is stored within the atmosphere, it can be transported, primarily to higher latitudes, by prevailing, large-scale winds. Or it can be transported vertically to higher levels in the atmosphere, where it forms clouds and subsequent storms, which then release the energy back to the atmosphere.
1. The passage mainly discusses how heat
(A) is transformed and transported in the Earth's atmosphere
(B) is transported by ocean currents
(C) can be measured and analyzed by scientists
(D) moves about the Earth's equator
2. The passage mentions that the tropics differ from the Earth's polar regions in which of the
following ways?
(A) The height of cloud formation in the atmosphere.
(B) The amount of heat they receive from the Sun.
(C) The strength of their large scale winds.
(D) The strength of their oceanic currents.
3. The word convert in line 6 is closest in meaning to
(A) mix
(B) change
(C) adapt
(D) reduce
4. Why does the author mention the stove in line 10?
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