编辑：乐闻携尔share 来源： 乐闻携尔 发布时间：2016-06-06
GRE 例句 As each source is activated, it generates a wave train that moves downward at a speed determined uniquely by the rock ’ s elastic characteristics.——GRE 1990年 04月题, Section A
act-=drive，如“action”（动作）（TPO-21: Autobiographical Memory）
-iv(e)*形容词后缀，如“progressive”（进步的）（OG Test 2: Loie Fuller）
-ate*常用的动词后缀，其名词形式是-ation，如”appreciate”（欣赏；赞赏）（TPO-29： Characteristics of Roman Pottery）
TOEFL例句 For the first time industrial waste, such as ash from the soap-boilers, was collected in the cities and sold in the country as artificial fertilizer.——TPO-23: Seventeenth-Century Dutch Agriculture
GRE 例句 However, a number of features that are characteristic of wind-pollinated plants reduce pollen waste.——GRE 1990年4月题, Section B
Passage Excerpt:“Growth, reproduction, and daily metabolism all require an organism to expend energy. The expenditure of energy is essentially a process of budgeting, just as finances are budgeted. If all of one ’ s money is spent on clothes, there may be none left to buy food or go to the movies. Similarly, a plant or animal cannot squander all its energy on growing a big body if none would be left over for reproduction, for this is the surest way to extinction.”
Online Test: Opportunists and Competitors
The word “squander” in the passage is closest in meaning to___.
A. extend B. transform C. activate D. waste
Passage Excerpt: “As railroad lines fanned out from Chicago, farmers began to acquire open prairie land in Illinois and then Iowa, putting the fertile, deep black soil into production. Commercial agriculture transformed this remarkable treeless environment. To settlers accustomed to eastern woodlands, the thousands of square miles of tall grass were an awesome sight. Indian grass, Canada wild rye, and native big bluestem all grew higher than a person. Because eastern plows could not penetrate the densely tangled roots of prairie grass, the earliest settlers erected farms along the boundary separating the forest from the prairie. In 1837, however, John Deere patented a sharp-cutting steel plow that sliced through the sod without soil sticking to the blade. Cyrus McCormick refined a mechanical reaper that harvested fourteen times more wheat with the same amount of labor. By the 1850s McCormick was selling 1,000 reapers a year and could not keep up with demand, while Deere turned out 10,000 plows annually.”
TPO-33: Railroads and Commercial Agriculturein Nineteenth-Century United States
The word “transformed” in the passage is closest in meaning to___.
A. dominated B. changed C. improved D. created
Passage Excerpt:“What could cause such high rates of extinction? There are several hypotheses, including warming or cooling of Earth, changes in seasonal fluctuations or ocean currents, and changing positions of the continents. Biological hypotheses include ecological changes brought about by the evolution of cooperation between insects and flowering plants or of bottom-feeding predators in the oceans. Some of the proposed mechanisms required a very brief period during which all extinctions suddenly took place; other mechanisms would be more likely to have taken place more gradually, over an extended period, or at different times on different continents. Some hypotheses fail to account for simultaneous extinctions on land and in the seas. Each mass extinction may have had a different cause. Evidence points to hunting by humans and habitat destruction as the likely causes for the current mass extinction.”
TPO-15: Mass Extinctions
The word “extended” in the passage is closest in meaning to___.
A.specific B.unlimited C.reasonable D. long