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本次的托福阅读考试是2010年3月6号北美考区的原题，根据考生的回忆，以及3月6号的题目，以下文章2012年4月22日托福阅读真题再现为大家奉上一份上次托福考试阅读部分的真题 阅读题目一考的是厄尔尼诺的起因，形成和影响。据考生回忆这次托福阅读考试大概讲道冷暖洋流的运动，对经济，渔业，气候的影响，以下是托福考试题目一 真题在现：厄尔尼诺定义 El Nino is defined by prolonged differences in Pacific Ocean surface temperatures when compared with the average value. The accepted definition is a warming or cooling of at least 0.5 °C (0.9 °F) averaged over the east-central tropical Pacific Ocean. Typically, this anomaly happens at irregular intervals of 3-7 years and lasts nine months to two years. The average period length is 5 years. When this warming or cooling occurs for only seven to nine months, it is classified as El Nino/La Nina "conditions"; when it occurs for more than that period, it is classified as El Nino/La Nina "episodes". The first signs of an El Nino are: ·Rise in surface pressure over the Indian Ocean, Indonesia, and Australia ·Fall in air pressure over Tahiti and the rest of the central and eastern Pacific Ocean ·Trade winds in the south Pacific weaken or head east ·Warm air rises near Peru, causing rain in the northern Peruvian deserts ·Warm water spreads from the west Pacific and the Indian Ocean to the east Pacific. It takes the rain with it, causing extensive drought in the western Pacific and rainfall in the normally dry eastern Pacific. El Nino's warm rush of nutrient-poor tropical water, heated by its eastward passage in the Equatorial Current, replaces the cold, nutrient-rich surface water of the Humboldt Current. When El Nino conditions last for many months, extensive ocean warming and the reduction in Easterly Trade winds limits upwelling of cold nutrient-rich deep water and its economic impact to local fishing for an international market can be serious. (责任编辑：admin) |
