以下为《选择性必修④ UNIT 2 课下主题训练 地球与宇宙奥秘探索》的无排版文字预览，完整格式请下载

下载前请仔细阅读文字预览以及下方图片预览。图片预览是什么样的，下载的文档就是什么样的。

选择性必修④ UNIT 2 课下主题训练 地球与宇宙奥秘探索

Ⅰ.阅读理解

Hidden beneath the surface in the roots of Earths astonishing and diverse plant life, there exists a biological superhighway linking together the members of the plant kingdom in what researchers call the “wood wide web”．

The network is comprised of thin threads of fungus (真菌) that grow outwards underground up to a few meters from its partnering plant, meaning that all of the plant life within a region likely connected to one another.The partnership is beneficial for both parties involved, plants provide carbohydrates (碳水化合物) to the funguses and in exchange, the funguses aid in gathering water and providing nutrients to its partnering plant.

A study conducted by Rensen Zeng of the South China Agricultural University found that this also allowed for plants to warn one another of potential harm.The study showed Broad Beans used the fungal network to spy on one another for upcoming danger.

Like our Internet, this fungal connectivity is also full of crime.Some plants, such as Golden Marigolds have been found to release poisons into the network to slow down the growth of surrounding plants in the fight for water and light.Other plants, such as the Phantom Orchid, do not have the chlorophyll (叶绿素) and must get the necessary nutrients from surrounding plants.

Research suggests that animals such as insects and worms may be able to detect slight exchanges of nutrients through the network, allowing them to more easily find delicious roots to feed 内容过长，仅展示头部和尾部部分文字预览，全文请查看图片预览。 my pleasure to recommend some tourist (tour) attractions to you.

6．Strict security (secure) measures are in force in the capital.

7．He went to the desk to inquire and made a reservation (reserve)．

8．The town is well placed for easy access to London and convenient (convenience) for Heathrow Airport.

[文章尾部最后300字内容到此结束,中间部分内容请查看底下的图片预览]

以上为《选择性必修④ UNIT 2 课下主题训练 地球与宇宙奥秘探索》的无排版文字预览，完整格式请下载

下载前请仔细阅读上面文字预览以及下方图片预览。图片预览是什么样的，下载的文档就是什么样的。