17. It can be inferred from the passage that ________.

　　A. nowadays people who want to change their skin color have to suffer a lot from the damage caused by the chemical treatment

　　B. Europeans and Africans have the same gene

　　C. the new discovery could help to find medical treatments for skin cancer

　　D. there are two kinds of genes

　　18. Scientists have done an experiment on a dark-striped zebrafish in order to ________.

　　A. find the different genes of humans’

　　B. prove the humans’ skin color is determined by the pigment gene

　　C. find out the reason why the Africans’ skin color is dark

　　D. find out the ways of changing people’s skin color

　　19. The reason why Europeans are light-skinned is probably that _____

　　A. they are born light-skinned people

　　B. light-skinned Europeans have mutation in the gene for melanin production

　　C. they have fewer activities outside

　　D. they pay much attention to protecting their skin

　　20. The writer’s attitude towards the discovery is ________.

　　A. neutral（中立的）

　　B. negative

　　C. positive

　　D. indifferent（冷漠）

　　—20、DABBC

　　阅读下列短文，从每题所给的A.B.C和D项中，选出最佳选项。

【四川省岳池县2017高考英语三轮冲刺自练8】相关文章：

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (73)

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (40)

★ 2017高考四川省广安市英语阅读理解一轮系列训练：2（含解析）

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（14）附答案

★ 辽宁省辽阳市2014高考英语单项选择一轮（暑假）训练（7）附答案

★ 浙江省湖州市2014高考英语阅读理解一轮（暑假）精炼（8）含答案

★ 2017高考四川省广安市英语阅读理解一轮系列训练：17（含解析）

★ 常熟市2014高考英阅读理解语一轮（暑假）训练题（2）及答案

★ （全国通用）2014届高考英语一轮单元复习 限时强化训练一

★ 贵州省贵阳市2014高考英语（新人教版）一轮阅读训练（34）附答案