1.According to the first paragraph,______ .

　　　A. man-made evolution has improved all species

　　　B. man-made evolution has weakened some species

　　　C man-made evolution can make up for all natural losses

　　D. natural evolution won’t happen without man’s assistance

　　2. What does the underlined part “taken a back seat to” in Paragraph 2 mean?

　　　A. Become powerful assistance to.

　　B. Become a huge barrier to.

　　　C Speeded up the process of.

　　D. Played a less important role than.

　　3 What does the third paragraph mainly talk about?

　　　A. Why natural evolution happens so slowly.

　　　B. The way scientists adopt to have genetic defects repaired.

　　　C. The advantages of man-made evolution over natural evolution.

　　　D. How scientists make use of man-made evolution to create new species.

　　BDC

　　阅读理解。阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。

　　In business, there is a speed difference: It's the difference between how important a firms leaders say speed is to their competitive (竞争的) strategy（策略）and how fast the company actually moves. The difference is important regardless of industry and company size .Companies fearful of losing their competitive advantage spend much time and money looking for ways to pick up the speed.

【2017届山西省保德县高考英语一轮复习阅读理解基础练：7（含解析）】相关文章：

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第17组（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文：解题技巧（含解析）

★ 2017届高考英语二轮复习课时训练：3（含解析）

★ 【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：6

★ 2017届高考英语二轮复习课时训练：13（含解析）

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 4 A卷 Word版含解析

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (66)

★ 2017届高考英语二轮复习大题冲关秘籍之日常交际用语大全：高考英语常考的数词、代词及其用法（含解析）

★ 2017高考四川省广安市英语阅读理解一轮系列训练：9（含解析）

★ 北京市2014高考英语一轮复习 练习手册（34）选修7 Unit 4 Sharing（含解析）新人教版