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新托福阅读词汇150题(36)：unprecedented&virtually

2015-08-11 11:14:23来源：网络

　　【新托福阅读词汇150题(36)：unprecedented&virtually】新托福TPO阅读中，词汇题是重要托福阅读题型。托福阅读词汇题做题需要考生掌握一定的词汇量和做题技巧。本文中新东方在线托福网汇总了新托福阅读词汇150题：unprecedented&virtually。

　　Paragraph 4: This unprecedented development of a finite groundwater resource with an almost negligible natural recharge rate—that is, virtually no natural water source to replenish the water supply—has caused water tables in the region to fall drastically. In the 1930s, wells encountered plentiful water at a depth of about 15 meters; currently, they must be dug to depths of 45 to 60 meters or more. In places, the water table is declining at a rate of a meter a year, necessitating the periodic deepening of wells and the use of ever-more-powerful pumps. It is estimated that at current withdrawal rates, much of the aquifer will run dry within 40 years. The situation is most critical in Texas, where the climate is driest, the greatest amount of water is being pumped, and the aquifer contains the least water. It is projected that the remaining Ogallala water will, by the year 2030, support only 35 to 40 percent of the irrigated acreage in Texas that is supported in 1980. 【TPO3- Depletion of the Ogallala Aquifer】

　　6. The word “unprecedented” in the passage is closest in meaning to(3)

　　○difficult to control

　　○without any restriction

　　○unlike anything in the past

　　○rapidly expanding

　　7. The word “virtually” in the passage is closest in meaning to (4)

　　○clearly

　　○perhaps

　　○frequently

　　○almost

　　答案见下一页：

本文关键字: 新托福阅读 托福阅读词汇 托福词汇

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