托福阅读事实信息题是阅读考试中比较常见的一种题型，tpo则是托福阅读备考最权威的材料，所以托福小编综合二者，为大家集中整理了tpo阅读中考察的事实信息题及其对应的解析，供大家参考使用。本文带来的是TPO20-1的事实信息题，一起来看看吧。
TPO20-1 Westward Migration
paragraph 3
The west had plenty of attractions: the alluvial river bottoms, the fecund soils of the rolling forest lands, the black loams of the prairies were tempting to New England farmers working their rock, sterile land and to southeastern farmers plagued with soil depletion and erosion. In 1820 under a new land law, a farm could be bought for 100. The continued proliferation of banks made it easier for those without cash to negotiate loans in paper money. Western farmers borrowed with the confident expectation that the exploding economy would keep farm prices high, thus making it easy to repay loans when they fell due.
6 According to paragraph 3, what was the significance of the land law passed in 1820?
○It granted government-supported loans to farmers.
○It provided farmland at an affordable price.
○It required banks to offer loans to farmers.
○It enabled farmers to sell their land for a profit.
解析：以1820做关键词定位至第二句，说1820年通过的新法案使农民可以用100USD买土地，后面又说银行业的兴盛使得那些没钱的人能得到纸币贷款，所以是农民买得起土地，正确答案是B。A的government-support，C的require和D的sell都没说
【3】西部吸引人的地方很多：冲积河床、绵延起伏的林地下的肥沃的土壤、大草原上的黑土，这些都吸引着在布满岩石又贫瘠的土地上劳作的新英格兰农民和饱受土壤损耗和流失困扰的东南部农民。根据1820年的一部新土地法，100美元就可以买一个农场。银行的不断发展使得那些没有现金的人贷款变得更容易了。西部的农民在贷款的时候都满怀信心，他们预期经济的发展会使农场的价格节节攀升，因此到期时要偿还贷款就比较容易。
TPO20-3 FOSSIL PRESERVATION
paragraph 3
Many other processes may after the shell of the clam or snail and enhance its chances for preservation. Water containing dissolved silica, calcium carbonate, or iron many circulate through the enclosing sediment and be deposited in cavities such as narrow cavities and canals in bone once occupied by blood vessels and nerves. In such cases, the original composition of the bone or shell remains, but the fossil is made harder and more durable. This addition of a chemically precipitated substance into precipitated is termed “permineralization.”
Q7 Which of the following best explains the process of permineralization mentioned in paragraph 3?
○Water containing calcium carbonate circulates through a shell and deposits sediment.
○Liquid containing chemicals hardens an already existing fossil structure.
○Water passes through sediment surrounding a fossil and removes its chemical content.
○A chemical substance enters a fossil and changes its shape.
解析：以permineralization做关键词定位至最后一句。说将chemically precipitate的物质加入precipitate的过程叫做permineralization，this指代前文，所以往前看，前面说血管和神经占据的空隙会被充填，骨头和壳体会留下来，变得更坚固，所以答案是B，变得更坚硬。A的包含calcium不全面，而且原文的变硬也没说;C的remove chemical content和D的change shape都没说
paragraph 7
The probability that actual remains of soft tissue will be preserved is improved if the organism dies in an environment of rapid deposition and oxygen deprivation. Under such conditions, the destructive effects of bacteria are diminished. The middle Eocene Messel shale (from about 48 million years ago) of German accumulated in such an environment. The shale was deposited in an oxygen-deficient lake where lethal gases sometimes bubbled up and killed animals. Their remains accumulated on the floor of the lake and were then covered by clay and silt. Among the superbly preserved Messel fossils are insects with iridescent exoskeletons (hard outer coverings), frogs with skin and blood vessels intact, and even entire small mammals with preserved fur and soft tissue.
11 According to paragraph 7, how do environments containing oxygen affect fossil preservation?
○They increase the probability that soft-tissued organisms will become fossils.
○They lead to more bacteria production.
○They slow the rate at which clay and silt are deposited.
○They reduce the chance that animal remains will be preserved.
解析：以oxygen做关键词定位至第一句，说如果快速埋藏，并且在缺氧环境下，化石保存的概率会增加，也就是说氧的存在不利于化石的保存，所以正确答案是D，A与D刚好完全相反，所以A错，也说明两个相反的有一个对;C完全没说;B错，原文说缺氧能减轻细菌的破坏作用，但并不意味着有氧细菌就会变多，所以B没说。
以上就是托福阅读TPO20-1中的事实信息题及其解析，大家可以在备考的时候参考复习，希望能够帮助大家的考前准备。最后前程百利祝大家都能取得理想的托福考试成绩。
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