本次考试重复了2014年3月15日的考试内容。

　　词汇题汇总：

　　Hence Implement Particularly Scarce

　　Principally Controversial Induce Fuels Tremendous

　　第一篇：讲的一种B动物(可以穿越树与树之间不掉下来)，在其他森林不怎么多，可是在美国的一个什么地方就很多。有3个theory ,但是每个都在段尾被反对，比如书很高，高度参差不齐，cane多，森林有毒的植物多。B动物必须(素食&肉食)爬山社会去其他森林找吃的。

　　相似TPO练习推荐：

　　TPO-28 Buck Rubs and Buck Scrapes

　　TPO-15 A Warm-Blooded Turtle

　　第二篇：

　　 美国如何改变耕地方式：文章具体描述了美国的土地侵蚀问题严重，导致了护林岸的威胁。为了解决这一问题，美国试图改革耕地方式，但后来又发现粮食的供应不够，出现新的问题。文中列举了一些实例，如东京等城市是如何处理这些问题的。

　　相似TPO练习推荐：

　　TPO-23 Seventeenth-Century Dutch Agriculture

　　相关知识背景：

　　The Dust Bowl, also known as the Dirty Thirties, was a period of severe dust storms that greatly damaged the ecology and agriculture of the US and Canadian prairies during the 1930s; severe drought and a failure to apply dryland farming methods to prevent wind erosion (the Aeolian processes) caused the phenomenon. The drought came in three waves, 1934, 1936, and 1939–40, but some regions of the high plains experienced drought conditions for as many as eight years. With insufficient understanding of the ecology of the plains, farmers had conducted extensive deep plowing of the virgin topsoil of the Great Plains during the previous decade; this had displaced the native, deep-rooted grasses that normally trapped soil and moisture even during periods of drought and high winds. The rapid mechanization of farm equipment, especially small gasoline tractors, and widespread use of the combine harvester contributed to farmers' decisions to convert arid grassland (much of which received no more than 10 inches (250 mm) of precipitation per year) to cultivated cropland.

　　第三篇： 海洋对于气候的影响。文章主要围绕的中心是大洋对于气候的影响，大体内容可以分为三个部分：

　　1. 气候模式是如何运作的，即ocean climate model的模式;

　　2. 某一种石灰石含有很多的一类气体，本来那种石头是可以吸收二氧化碳的，但是里面的气体释放出来会增加温室效应;

　　3. 海洋的释放出来的水蒸气会形成冰雪。

　　相似TPO练习推荐：

　　TPO-10 Variations in the Climate

　　TPO-23 Urban Climates

　　相关知识背景：

　　Ocean currents greatly affect Earth's climate by transferring heat from the tropics to the polar regions. Transferring warm or cold air and precipitation to coastal regions, winds may carry them inland. Surface heat and freshwater fluxes create global density gradients that drive the thermohaline circulation part of large-scale ocean circulation. It plays an important role in supplying heat to the polar regions, and thus in sea ice regulation. Changes in the thermohaline circulation are thought to have significant impacts on Earth's radiation budget. In so far as the thermohaline circulation governs the rate at which deep waters reach the surface, it may also significantly influence atmospheric carbon dioxide concentrations.

　　For a discussion of the possibilities of changes to the thermohaline circulation under global warming, see shutdown of thermohaline circulation.

　　It is often stated that the thermohaline circulation is the primary reason that the climate of Western Europe is so temperate. An alternate hypothesis claims that this is largely incorrect, and that Europe is warm mostly because it lies downwind of an ocean basin, and because atmospheric waves bring warm air north from the subtropics.

　　The Antarctic Circumpolar Current encircles that continent, influencing the area's climate and connecting currents in several oceans.

　　One of the most dramatic forms of weather occurs over the oceans: tropical cyclones (also called "typhoons" and "hurricanes" depending upon where the system forms).