The researchers, who worked on the molecules of snapdragons(金鱼草),found that the molecules are volatile(易挥发的) and quickly bond with pollutants, mainly formed from vehicle(车辆)emissions. This chemically changes the molecules so that they no longer smell like flowers. A harmful cycle is therefore set up where insects struggle to get enough food and the plants do not get pollinated enough to multiply.

　　Already bees, which pollinate most of the world’s crops, are in such a great decline that has never been known before in Britain and across much of the globe. At least a quarter of America’s 2.5 million honey bee colonies have been mysteriously wiped out by colony collapse disorder(CCD),where hives are found suddenly deserted.

　　The crisis(危机) has now spread to Europe. Politicians insist that CCD has not yet been found in Britain, but considering the present number of bees, the agriculture minister Lord Rooker table bed. Birds also find has sent the warning, “The honey bee population could be wiped out in 10 years.”

　　Although the researchers are not certain whether this is the real cause of CCD, they say that pollution is making life more difficult for bees and other insects in many ways.

　　72. In what way does pollution prevent flowers from attracting bees?

　　A. By shortening the distance traveled by the scent molecules of flowers.

　　B. By disturbing the bees’ ability to attract mates.

【2017年高考英语二轮复习讲义阅读理解训练09：（答案）】相关文章：

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题01 写作技巧（学生版）

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习完形填空专题训练：技法1 利用上下文暗示解题（含解析）

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习短文改错专题训练：考法3 行文逻辑错误（含解析）

★ 2017届高考英语二轮复习课时训练：7（含解析）

★ 2017届高考英语二轮复习课时训练：4（含解析）

★ 2017届高考英语二轮复习课时训练：2（含解析）

★ 2017届高考英语二轮复习课时训练：5（含解析）

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 9 B卷 Word版含解析

★ 2017届高考英语二轮复习课时训练：6（含解析）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (97)