2017年银川托福考试词汇真题汇总(附答案)

【银川托福】2017年托福考试词汇真题汇总1. The quality of preservation is outstanding, but what is even more impressive is the number of ichthyosaur fossils containing preserved embryos.The word "outstanding" is closest in meaning to which of following?(A) extensive 广阔的规模大的(B) surprising(C) vertical垂直的(D) excellent2. Ichthyosaurs with embryos have been reported from 6 different levels of the shale in a small area around Holzamden, suggesting that a specific site was used by large numbers of ichthyosaurs repeatedly over time.The word "site" is closest in meaning to which of following?(A) example(B) location(C) development(D) characteristic3. The quality of preservation is almost unmatched, and quarry operations have been carried out carefully with an awareness of the value of the fossils. But these factors do not account for the interesting question of how there came to be such a concentration of pregnant ichthyosaurs in a particular place very close to theirtime of giving birth.The phrase "account for " is closest in meaning to which of following?(A) record(B) describe(C) equal(D) explain4. In the seventeenth century the organ, the clavichord, and the harpsichord became the chief instruments of the keyboard group, a至高权利 supremacy they maintained until the piano supplanted them at the end of the eighteenth century.The words "a supremacy" in line 9 are closest in meaning to(A) a suggestion(B) an improvement(C) a dominance控制力(D) a development5. A series of mechanical improvements continuing well into the nineteenth century, including the introduction of pedals to sustain tone or to soften it, the perfection of a metal frame, and steel wire of the finest quality, finally produced an instrument capable of 无数的myriad tonal effects from the most delicate harmonies to an almost orchestral fullness of sound, from a liquid, singing tone to a ship, percussive brilliance.The word "myriad" is closest in meaning to which of following?(A) noticeable(B) many(C) loud(D) unusual6. Each one was virtually a stone town, which is why the Spanish would later call them pueblos, the Spanish word for towns. These pueblos represent one of the Anasazis' supreme achievements. At least a dozen large stone houses took shape below the bluffs of Chiaco Canyon in northwest New Mexico.The word "supreme" is closest in meaning to which of following?(A) most common(B) most outstanding(C) most expensive(D) most convenient7. They functioned as sanctuaries where the elders met to plan festivals, perform ritual dances, settle pueblo affairs, and impart tribal lore to the younger generation.The word "settle" is closest in meaning to which of following?(A) sink(B) decide(C) clarify(D) locate8. Then, to connect the pueblos and to give access to the surrounding tableland, the architects laid out a system of public roads with stone staircases for ascending上升的 cliff faces.The word "ascending" is closest in meaning to which of following?(A) arriving at(B) carving(C) connecting(D) climbing9. Within a very short time, however, the incongruity of playing lively music to a 严肃的solemn film became apparent, and film pianists began to take some care in matching their pieces to the mood of the film.The word "solemn" is closest in meaning to which of following?(A) simple(B) serious(C) short(D) silent10. Certain films had music especially composed for them. The most famous of these early special scores was that composed and arranged for D. W. Griffith's film Birth of a Nation, which was released in 1915.The word "composed" is closest in meaning to which of following?(A) selected(B) combined(C) played(D) createdThe word "scores" is closest in meaning to which of following?(A) totals(B) successes(C) musical compositions(D) groups of musiciansDivisions in the Earth's Interior(Adapted from, Beatty, 1990.)Seismic discontinuities aid in distinguishing divisions of the Earth into inner core, outer core, D", lower mantle, transition region, upper mantle, and crust (oceanic and continental). Lateral discontinuities also have been distinguished and mapped through seismic tomography but shall not be discussed here.Inner core: 1.7% of the Earth's mass; depth of 5,150-6,370 kilometers (3,219 - 3,981 miles)The inner core is solid and unattached to the mantle, suspended in the molten outer core. It is believed to have solidified as a result of pressure-freezing which occurs to most liquids when temperature decreases or pressure increases.Outer core: 30.8% of Earth's mass; depth of 2,890-5,150 kilometers (1,806 - 3,219 miles)The outer core is a hot, electrically conducting liquid within which convective motion occurs. This conductive layer combines with Earth's rotation to create a dynamo effect that maintains a system of electrical currents known as the Earth's magnetic field. It is also responsible for the subtle jerking of Earth's rotation.This layer is not as dense as pure molten iron, which indicates the presence of lighter elements. Scientists suspect that about 10% of the layer is composed of sulfur and/or oxygen because these elements are abundant in the cosmos and dissolve readily in molten iron. D": 3% of Earth's mass; depth of 2,700-2,890 kilometers (1,688 - 1,806 miles)This layer is 200 to 300 kilometers (125 to 188 miles) thick and represents about 4% of the mantle-crust mass. Although it is often identified as part of the lower mantle, seismic discontinuities suggest the D" layer might differ chemically from the lower mantle lying above it. Scientists theorize that the material either dissolved in the core, or was able to sink through the mantle but not into the core because of its density.Lower mantle: 49.2% of Earth's mass; depth of 650-2,890 kilometers (406 -1,806 miles)The lower mantle contains 72.9% of the mantle-crust mass and is probably composed mainly of silicon, magnesium, and oxygen. It probably also contains some iron, calcium, and aluminum. Scientists make these deductions by assuming the Earth has a similar abundance and proportion of cosmic elements as found in the Sun and primitive meteorites.Transition region: 7.5% of Earth's mass; depth of 400-650 kilometers (250-406 miles)The transition region or mesosphere (for middle mantle), sometimes called the fertile layer, contains 11.1% of the mantle-crust mass and is the source of basalticmagmas. It also contains calcium, aluminum, and garnet, which is a complex aluminum-bearing silicate mineral. This layer is dense when cold because of the garnet. It is buoyant when hot because these minerals melt easily to form basalt which can then rise through the upper layers as magma.Upper mantle: 10.3% of Earth's mass; depth of 10-400 kilometers (6 - 250 miles) The upper mantle contains 15.3% of the mantle-crust mass. Fragments have been excavated for our observation by eroded mountain belts and volcanic eruptions.Olivine (Mg,Fe)2SiO4 and pyroxene (Mg,Fe)SiO3 have been the primary minerals found in this way. These and other minerals are refractory and crystalline at high temperatures; therefore, most settle out of rising magma, either forming new crustal material or never leaving the mantle. Part of the upper mantle called the asthenosphere might be partially molten.Oceanic crust: 0.099% of Earth's mass; depth of 0-10 kilometers (0 - 6 miles) The oceanic crust contains 0.147% of the mantle-crust mass. The majority of the Earth's crust was made through volcanic activity. The oceanic ridge system, a 40,000-kilometer (25,000 mile) network of volcanoes, generates new oceanic crust at the rate of 17 km3 per year, covering the ocean floor with basalt. Hawaii and Iceland are two examples of the accumulation of basalt piles.Continental crust: 0.374% of Earth's mass; depth of 0-50 kilometers (0 - 31 miles).The continental crust contains 0.554% of the mantle-crust mass. This is the outer part of the Earth composed essentially of crystalline rocks. These are low-densitybuoyant minerals dominated mostly by quartz (SiO2) and feldspars (metal-poor silicates). The crust (both oceanic and continental) is the surface of the Earth; as such, it is the coldest part of our planet. Because cold rocks deform slowly, we refer to this rigid outer shell as the lithosphere (the rocky or strong layer).The many part of the earth’s atmosphere are linked with the various parts of the earth’s surface to produce a whole---the climate system. Different parts of the earth’s surface react to the energy of the sun in different ways. For example, ice and snow reflect much of it. Land surfaces absorb solar energy and heat up rapidly. Oceans store the energy without experiencing a significant temperature rise. Thus, the different types of surfaces transfer heat into the atmosphere at different rates.We can view climate as existing in three domains: space, time, and human perception. In the domain of space, we can study local, regional, and global climates. In time, we can look at the climate for a year, a decade, a millennium, and so forth. Finally, we depend on our perceptions of the data, so we must include our own human perception into our model. Human perception must be included if our understanding of climatic processes is to be translated into societal actions. As a society, we make informed choices about how to use the beneficial effects of climate, such as deciding when and where to plant crops. We also make choices about how to minimize the harmful effects of climate---storms, blizzards, and droughts.1.Why does the author discuss different parts of the earth’s surface in paragraph 1?A.To explain why humans live in some parts but not in othersB.To show that the entire earth is made of the same materialsC.To compare how various surfaces transfer heat into the atmosphereD.To describe changes in the earth’s appearance throughout the year.2.According to the author, why must we include human perception in our study of climate?A.We must interpret data and take actions related to climateB.We must create an interesting model of the climate systemC.We must develop an understanding of our environmentD.We must change our traditional ways of studying climate.(思考)3. Read the sentence below and write an essay which will have a minimum of 100 words.Our understanding of climatic processes is to be translated into societal actions.答案：1.C 2.AThe discovery of freezing has changed our eating habits more than any other related invention. Because many foods contain large amounts of water, they freeze solidly at or just below 32 degrees Fahrenheit. When we lower the temperature to well below the freezing point and prevent air from penetrating the food, we retard the natural process of decay that causes food to spoil. Freezing preserves the flavor and nutrients of food better than any other preservation method. When properly prepared and packed, foods and vegetables can be stored in the freezer for one year.Most vegetables and some fruits need blanching before they are frozen, and to avoid this step would be an expensive mistake. The result would be a product largely devoid of vitamins and minerals. Proper blanching curtails the enzyme action, which vegetables require during their growth and ripening but which continues after maturation and will lead to decay unless it is almost entirely stopped by blanching. This process is done in two ways, either by plunging vegetables in a large amount of rapidly boiling water for a few minutes or by steaming them. For steam blanching, it is important that timing begin when the water at the bottom of the pot is boiling. Different vegetables require different blanching times, and specified times for each vegetable must be observed. Under-blanching is like no blanching at all, and over-blanching, while stopping the enzyme action, will produce soggy, discolored vegetables.1.Why does the author mention 32 degrees Fahrenheit?A.To suggest the storage temperature for most foodsB.To identify the freezing point of waterC.To state the correct setting for a freezerD.To give the temperature for blanching2.Why does the author use the term expensive mistake in discussing blanching?A.To state that blanching is expensive but very effectiveB.To warn that not blanching will harm the food’s nutritional valueC.To emphasize the importance of blanching only a few items at a timeD.To show that many people waste food by blanching improperly答案：1.B2.B。