Working with tools also helped to develop human intelligence. The human brain grew bigger, and human beings began to invent more and more tools and machines. The stone chip was one of the first tools that people used, and perhaps it is the most important. Some scientists say that it was the key to success of mankind.

　　Since 1960 a new kind of tool has appeared. This is the silicon chip (硅芯片). It is smaller than a finger nail, but it can store lots of information. It is an electronic brain. Every year these chips get cleverer, but their size gets smaller, and their cost gets less. They are used in watches, calculators and intelligent machines that we can use in many ways. In the future we will not need to work with tools in the old way. Machines will do everything for us. People will have plenty of spare time. But what will they do with it?

　　Human beings used stone chips for more than two million years, but human life changed very little in that time. We have used silicon chips for only a few years, but life is changing faster every day. What will life be like twenty years from now? What will the world be like two million years from now?

　　64. From paragraph 1, we can know ________.

　　A. why early human beings cut skin from dead animals

　　B. how early human beings discovered the tools

　　C. what early human beings used the tools for

　　D. what food early human beings stored

【河北省武邑中学2016届高考英语一轮复习单元检测：42】相关文章：

★ 2017届高考英语二轮复习课时训练：23（含解析）

★ 2014届高考英语一轮复习课时作业(二十八)必修5Module 4《Carnival》（外研版）

★ 【浙江专用】2014届高考英语一轮复习课时作业(三十六)选修8Unit 1《A land of diversity》

★ 【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

★ 四川省2016届高考英语一轮复习课时作业（47） Module 5 The Conquest of the Universe 外研版选修8

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (62)

★ 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10 旅游探险类话题指导（学生版）

★ 【浙江专用】2014届高考英语一轮复习课时作业(十二)必修3Unit 2《Healthy eating》

★ 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10 旅游探险类话题指导（教师版）

★ 山东省济宁市2016年高考英语复习：让步状语从句20题