兔子q 发表于 2019-4-10 16:21:18

TPO5托福阅读单项之-真题全集高清PDF下载

托福备考你是否因做无效题而浪费时间你是否天天刷题，但总是低分徘徊一次次考砸，心累到吐血？小编倾力整理了考试提分有用的干货——托福阅读单项题，帮助学子们更好的备考。



TPO5托福阅读Passage1原文文本

Minerals and Plants

Research has shown that certain minerals are required by plants for normal growth and development. The soil is the source of these minerals, which are absorbed by the plant with the water from the soil. Even nitrogen, which is a gas in its elemental state, is normally absorbed from the soil as nitrate ions. Some soils are notoriously deficient in micro nutrients and are therefore unable to support most plant life. So-called serpentine soils, for example, are deficient in calcium, and only plants able to tolerate low levels of this mineral can survive. In modern agriculture, mineral depletion of soils is a major concern, since harvesting crops interrupts the recycling of nutrients back to the soil.


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3A82V1PK7VYA 发表于 2021-4-17 14:59:34

谢谢分享

3A42J8QWY6M9 发表于 2021-6-5 11:19:56

感谢分享！

3G3JX4FJIY0 发表于 2021-9-19 23:31:07


thanks a lot!!

30P4ALB1O2MN 发表于 2021-9-24 09:21:22

谢谢分享了

3NUVWHQS0J31 发表于 2022-1-7 16:00:22

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