2017届湖北省黄冈市高考英语阅读理解二轮精练：13（含解析）_高考复习指南

2017届湖北省黄冈市高考英语阅读理解二轮精练：13（含解析）

　　A. Rivers may be a source of the greenhouse gas nitrous oxide.

　　B. It’s human activities that release nitrogen into the environment.

　　C. How to reduce nitrous oxide emissions from river networks

　　D What to do with the climate change caused by nitrous oxide.

　　【参考答案】1—4、ADDA

　　阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。

　　Plants can’t communicate by moving or making sounds, as most animals do. Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas. A flower’s sweet smell, for example, comes from volatile compounds that the plant produces to attract insects such as bugs and bees.

　　Plants can also detect volatile compounds produced by other plants. A tree under attack by hungry insects, for instance, may give off volatile compounds that let other trees know about the attack. In response, the other trees may send off chemicals to keep the bugs away—or even chemicals that attract the bugs’ natural enemies.

　　Now scientists have created a quick way to understand what plants are saying:　a chemical sensor(传感器) called an electronic nose. The“e-nose” can tell compounds that crop plants make when they’re attacked. Scientists say the e-nose could help quickly detect whether plants are being eaten by insects. But today the only way to detect such insects is to visually inspect individual plants. This is a challenging task for managers of greenhouses, enclosed gardens that can house thousands of plants.