The seawater Dore and his colleagues have analyzed confirms what the theory predicts.

　　The effect was particularly striking at about 250 meters down，and again at 500 meters.Dore and his colleagues came up with two possible explanations.It could be that surface water picked up CO2 and then moved to those depths.Or there could be a biological explanation.

　　“It's important to realize that the oceans are really becoming acidic.And it could have negative impacts on a whole variety of sea life from fish to coral.It's potentially catastrophic.”

　　1．What can be the best title of the passage?

　　A．Sea Life Facing Danger

　　B．Scientist Researching Seawater

　　C．Oceans Becoming More Acidic

　　D．Climate Change Affecting Seawater

　　2．Which of the following shows the process of the impact of atmospheric CO2 on sea life?

　　a．Sea life is endangered.

　　b．CO2 goes into the surface water.

　　c．The ocean chemistry is affected.

　　d．CO2 decreases the pH and makes the seawater more acidic.

　　e．CO2 levels in the atmosphere go up.

　　A.―→―→―→―→

　　B.―→―→―→―→

　　C.―→―→―→―→

　　D.―→―→―→―→

　　3．Scientist Robert Dore came to the conclusion based on ______.

【【北师大版】2014届高考英语一轮复习指导课时作业：Unit 20 A卷 Word版含解析】相关文章：

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修4 Unit 1《Advertising》

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 11 A卷 Word版含解析

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 8 A卷 Word版含解析

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 7 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 (55)

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修3 Unit 2《Language》课时跟踪检测A卷（含解析）

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 10 A卷 Word版含解析

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 5 A卷 Word版含解析

★ 【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

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 6 B卷 Word版含解析