The U．N. agency says farmers should grow different kinds of bananas. This protects against diseases that affect only one kind. Experts warn that disease may cause the Cavendish banana to disappear. This happened earlier to another popular banana because of its genetic weakness against disease.

　　[语篇解读]　香蕉由于遗传性的抗病弱点，在不久的将来有的品种可能会消失。文章列举了两种威胁Cavendish香蕉的真菌病，国际组织建议农民种植更多种类的香蕉。

　　1．What does this passage mainly tell us?

　　A. Bananas are the world’ s most important food crops.

　　B. The risk to a popular banana shows need to grow other kinds.

　　C. There are five hundred different kinds of bananas.

　　D. How to grow bananas in different countries.

　　[解析]　主旨大意题。根据全文内容和结构判断，文章主要介绍威胁Cavendish香蕉的真菌类疾病，进而显示出种植其他种类香蕉的必要性。故答案为B。

　　[答案]　B

　　2．Bananas are threatened by disease because ________.

　　A. they grow from seeds

　　B. they are one of the most valuable exports

　　C. the only way to prevent it is to put chemicals on their leaves

　　D. they have genetic weaknesses against disease

　　[解析]　细节理解题。根据第一段内容可知，香蕉易受病害威胁是因为其遗传上的抗病弱点。后文也有叙述。

【2017届高考英语二轮专题总复习精选综合能力专练：阅读理解18】相关文章：

★ 【三维设计】2017届高考英语（江苏专用）二轮复习阅读理解解题技法示范课件：4

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (54)

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修5 unit5《First aid》

★ 【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2 句法错误（含解析）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修2 unit5《Music》

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练：4（含解析）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (59)

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (67)

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 2 B卷 Word版含解析

★ 2017年高考英语二轮复习精品资料：专题15 完形填空（教学案）（原卷版）