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1、Unit 3 ComputersMost kids have cellphones or tablets (平板) and are texting or using social media all the time. Experts say that parents should use apps to watch out for their childrens online activities.According to a survey, 70 percent of US. teens carry cellphones, and Russ Warner, the CEO of Net N
2、anny, is in the business of protecting kids online. His best advice to parents is to know what is out there and to plan in advance.“Put a plan into place because kids like to feel protected，” Warner said. “They like to feel like Mom or Dad is helping.”According to another study, almost 90 percent of
3、 children have seen cyber bullying (网络欺凌) in the last year. However, Warner said only 50 percent of parents talk with kids about avoiding these experiences.“That means the other half dont and thats a problem，” he said.Warner often speaks to parent groups concerned about keeping their teens safe, “Of
4、tentimes (时常地) if we cant control or we dont understand something, we avoid it and we cant do that anymore.”He said parents need to talk to their children about online danger, and then they need to use safety software. Parents should know who is trying to communicate with their children and what the
5、y are watching online.Warner added parents also need to understand phone settings (设置). iPhone settings come with restrictions (限制) that are easy to set. Parents can enable restrictions with a code that they know, and their child does not. Parents can also set phones to not allow apps to be download
6、ed without a passcode.Section_Warming Up & Reading PrereadingWHO AM I?Over time I have been changed quite a lot. I began as a calculating machine in France in 1642. Although I was young I could simplify difficult sums. I developed very slowly and it took nearly two hundred years before I was built a
7、s an analytical machine by Charles Babbage. After I was programmed by an operator who used cards with holes, I could “think” logically and produce an answer quicker than any person. At that time it was considered a technological revolution and the start of my “artificial intelligence”. In 1936 my re
8、al father, Alan Turing, wrote a book about how I could be made to work as a “universal machine” to solve any difficult mathematical problem. From then on， I grew rapidly both in size and in brainpower. By the 1940s I had grown as large as a room， and I wondered if I would grow any larger. However, t
9、his reality also worried my designers. As time went by， I was made smaller. First as a PC (personal computer) and then as a laptop, I have been used in offices and homes since the 1970s.over time经过漫长的时间；随着时间的推移，在句中作状语，句子用现在完成时。calculate/klkjleIt/vt.计算calculator/klkjleIt/n. C计算器calculation n. U计算simp
10、lify/sImplIfaI/vt.简化sum/sm/n.总数；算术题；金额a sum of money 一笔钱此句使用了固定句式：It takes时间段before .“过了多久才”。program v编写程序 n(计算机)程序programmer/prrm/n.程序员；程序师operator/preIt/n.(电脑)操作员；接线员logically/ldIklI/adv.逻辑上；合逻辑地；有条理地logical/ldIkl/adj.合逻辑的；合情理的technological/teknldIkl/adj.科技的technology/teknldI/n.工艺；科技；技术revolution/
11、revlun/n.革命technological revolution 技术革命artificial/tIfIl/adj.人造的；假的intelligence/IntelIdns/n.智力；聪明；智能artificial intelligence 人工智能solve/slv/vt.解决；解答mathematical/mmtIkl/adj.数学的how引导宾语从句；to solve .为不定式短语作目的状语。from . on 从时起“by过去时间”作状语，句子通常用过去完成时。any为程度副词，修饰比较级。reality/rIltI/n.真实；事实；现实in reality事实上；实际上as引
12、导时间状语从句。personal/psnl/adj.私人的；个人的；亲自的personally/psnlI/adv.就个人而言；亲自我是谁？第1段译文经过一段时间我已经被改变了很多。1642年我在法国诞生时是一台计算机器。尽管当时我很年轻，但是我能简化一些复杂的数学题。我发育缓慢，差不多到了两百年之后，查尔斯巴比奇才把我制成了一台分析机。在操作员用穿孔卡为我设计程序后，我能够进行逻辑“思考”，并且能够比任何人更快地算出答案。那时这被当作一次技术革命，也是我“人工智能”的开始。在1936年，我真正的父亲艾伦图灵写了一本书，讲述了怎样使我成为一台“通用机器”来解决任何数学难题。从那时起，我在体积和
13、脑容量方面迅速成长。到20世纪40年代，我已经长得像一间屋子那么大，我不知道是否还会长得更大。但是，这个现实也使得我的设计者很担心。随着时间的推移，我被做得更小了。自20世纪70年代以来，我一直被用在办公室和家庭里，先是用作个人电脑，后来又做成便携式电脑。These changes only became possible as my memory improved. First it was stored in tubes， then on transistors and later on very small chips. As a result I totally changed my
14、shape. As I have grown older I have also grown smaller. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told！ And my memory became so large that even I couldnt believe it! But I was always so lonely standing there by myself, until in the early 19
15、60s they gave me a family connected by a network. I was able to share my knowledge with others through the World Wide Web.Since the 1970s many new applications have been found for me. I have become very important in communication, finance and trade. I have also been put into robots and used to make mobile phones as well as help with medical operations. I have even been put into space rockets and sent to explore the Moon and Mars. Anyhow， my goal is to provide humans with a life of high quality. I am now truly filled with happiness that I am a
