文勇的新托福黄金&ccedil

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Unformatted text preview: lete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. The Ogallala is a large underground source of water in the High Plains region of the United States. ● ● ● Answer choices ○The use of the Ogallala for irrigation has allowed the High Plains to become one of the most productive agricultural regions in the United States. ○Given the aquifer’s low recharge rate, its use for irrigation is causing water tables to drop and will eventually lead to its depletion. ○Releasing capillary water and introducing drought­resistant crops are less­promising solutions to the water supply crisis than bringing in river water ○The periodic deepening of wells and the use of more­powerful pumps would help increase the natural recharge rate of the Ogallala. ○In Texas, a great deal of attention is being paid to genetic engineering because it is there that the most critical situation exists. ○Several solutions to the upcoming water supply crisis have been proposed, but none of them promises to keep the costs of irrigation low. 123 Mail@liuwenyong.com 在在在在在在 www.liuwenyong.com 在在在在在在在在在在在在在在在,在在在在在在在在在在 在在在在在 ○4 2. ○2 3. ○1 4. ○4 5. ○3 6. ○3 7. ○4 8. ○1 9. ○3 10. ○3 11. ○2 12. ○2 13. ○3 14. ○1, 2, 6 1. 124 Mail@liuwenyong.com 在在在在在在 www.liuwenyong.com 在在在在在在在在在在在在在在在,在在在在在在在在在在 在在在在 在在在在在在在在在在 19 在在 80 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 50 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 20 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 583000 在在在在在在在在在在在 30000 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 在在在在在在在在在在在在在在在在在在在 20 在在 30 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 20 在在 50 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在 100000 在在在在在在在在在在 4500000 在在在在 在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在在...
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This note was uploaded on 09/17/2013 for the course LANGUAGE 13DL208 taught by Professor Wang during the Fall '13 term at East China Normal University.

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