说到托福阅读备考，TPO是必不可少的备考神器，通过TPO练习来更好的适应阅读考试的节奏。本文小编带来的托福阅读笔记是TPO5 Minerals and Plants的的内容，希望能够与正在备考的大家一起进步。
TPO5 Minerals and Plants
文章题材：自然科学—矿物和植物
常见词汇：
selectively adv. 有选择地
protection [prə'tekʃən] n. 保护，防卫
indicate ['indikeit] v. 显示，象征，指示v. 指明，表明
notoriously [nəu'tɔ:riəsli] adv. 臭名昭著地，众所周知地
prevent [pri'vent] v. 预防，防止
affect [ə'fekt] vt. 影响，作用，感动
calcium ['kælsiəm] n. 钙
survive [sə'vaiv] vt. 比 ... 活得长，幸免于难，艰难度过
nutrient ['nju:triənt] adj. 营养的，滋养的n. 营养物，营养品
emphasize ['emfəsaiz] vt. 强调，着重
易错题解析：
Paragraph 6: Only recently have investigators considered using these plants to clean up soil and waste sites that have been contaminated by toxic levels of heavy metals – an environmentally friendly approach known as phytoremediation. This scenario begins with the planting of hyper accumulating species in the target area, such as an abandoned mine or an irrigation pond contaminated by runoff. Toxic minerals would first be absorbed by roots but later relocated to the stem and leaves. A harvest of the shoots would remove the toxic compounds off site to be burned or composted to recover the metal for industrial uses. After several years of cultivation and harvest, the site would be restored at a cost much lower than the price of excavation and reburial, the standard practice for remediation of contaminated soils. For examples, in field trials, the plant alpine pennycress removed zinc and cadmium from soils near a zinc smelter, and Indian mustard, native to Pakistan and India, has been effective in reducing levels of selenium salts by 50 percent in contaminated soils.
7. It can be inferred from Paragraph6 that compared with standard practices for remediation of contaminated soils, phytoremediation
¡does not allow for the use of the removed minerals for industrial purposes.
¡can be faster to implement
¡is equally friendly to the environment
¡is less suitable for soils that need to be used within a short period of time.
题型：推理题。答案是(D)
解析：首先读题干定位出关键词phytoremediation 回原文寻找相关信息an environmentally friendly approach (C选项内容体现)known as phytoremediation. Toxic minerals would first be absorbed by roots but later relocated to the stem and leaves. A harvest of the shoots would remove the toxic compounds off site to be burned or composted to recover the metal for industrial uses. (A选项内容错误证据)After several years of cultivation and harvest,(B选项内容错误D正确的证据) the site would be restored at a cost much lower than the price of excavation and reburial, the standard practice for remediation of contaminated soils.综合以上分析所以正确答案为D。
2. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some answer choices 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.
Plants need to absorb certain minerals from the soil in adequate quantities for normal growth and development.
Answer Choices
1. Some plants are able to accumulate extremely high levels of certain minerals and thus can be used to clean up soils contaminated with toxic levels of these minerals.
2. Though beneficial in lower levels, high levels of salts, other minerals, and heavy metals can be harmful to plants.
3. When plants do not absorb sufficient amounts of essential minerals, characteristic abnormalities result.
4. Because high concentrations of sodium chloride and other salts limit growth in most plants, much research has been done in an effort to develop salt-tolerant agricultural crops.
5. Some plants can tolerate comparatively low levels of certain minerals, but such plants are of little use for recycling nutrients back into depleted soils.
6. Mineral deficiencies in many plants can be cured by misting their roots with a nutrient solution or by transferring the plants to a soilless nutrient solution.
题型：文章总结题，答案ABC.
文章大意：
第一段：certain minerals are required by plants for normal growth and development;
第二段：Mineral deficiencies can often be detected by specific symptoms;
第三段：hydroponically,&Acroponics are both for growing plants without soil. 第四段：an overabundance of certain minerals can be toxic and can also limit growth& the toxic effects of heavy metals
第五段：hyper accumulators can concentrate minerals at levels a hundredfold or greater than normal.
第六段：using these plants to clean up soil and waste sites that have been contaminated by toxic levels of heavy metals – an environmentally friendly approach known as phytoremediation。
解析：本题考查文章大意。
A选项是第六段意思的体现;
B选项是第四段两层意思的概括总结。
C选项是第二自然段意思的体现。
D选项是第四段的细节。
E是第一段的例子
F选项是第三段第二个细节的体现。
以上就是小编带来的托福阅读笔记之TPO5 Minerals and Plants，希望能够和备考的大家一起学习。更多托福考试资讯请关注前程百利。
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