Didyoueverwonderwhatplantseat?Mostly,theytakethingsth...

问题详情：

   Did you ever wonder what plants eat? Mostly, they take things that human don’t want, like carbon dioxide( 二氧化碳) can turn them into things that we want, like oxygen(氧气).  36   We Burn plants for fuel. We even use plants for wood to build houses, but plants can do a lot more. Scientists are using plants to clean up pollution.

  37  “Phyto” means plant, and “remediation” means to cure. So using plants to clean up the environment is really a way to cure our planet of pollution. All plants help to clean the air by taking in carbon dioxide and giving out oxygen.

  38   Trees take in dirty water through their roots, and sweat out clean water through their leaves. The pollution stays inside the trees until they die.  39   Scientists have used trees to clean not only ground water, but also the soil. The plants take in the pollutants(污染物) in the soil, along with water.

Plants can also work with bacteria (细菌) in the soil.   40 __ Then the plants take in what is left. Using plants to clean up pollution makes good sense. The process results in cleaner air, cleaner water and cleaner soil.

A. We eat plants to stay healthy.

B. But few people know how to plant trees.

C. Trees may be used to clean ground water.

D. There are many kinds of plants that can clean up pollution.

E. The bacteria eat the pollution first and change it into plant food.

F. So the pollution can not harm humans once it is taken in by trees.

G. The process of using plants to clean up pollution is called “phytoremediation”.

【回答】

AGCFE

知识点：七选五题型

题型：未分类