专题三 阅读理解（PPT）-【全效作业本】2022-2023学年高中必修第二册英语同步课件及教参（人教版2019）

专题三　阅读理解 《全效作业本》 英语 必修 第二册 [RJ] A Many Americans use smartphones for most or all of their day－to－day communication activities.One result is that people have gotten faster and better at typing emails and text messages on their phones. But how fast are we at using an electronic device compared to typing words on a traditional，physical keyboard？A new study has some answers.A team of researchers carried out an experiment.It involved more than 37，000 volunteers from over 160 countries. The study was a project of researchers from some universities in Europe.They used an Internet－based system on the smartphones. 《全效作业本》 英语 必修 第二册 [RJ] On average，the volunteers estimated they spent about six hours a day using their phones.The majority said they used two thumbs to write messages. The volunteers were given 15 English sentences to type out on their phones “as quickly and accurately as possible”．The research team found that on average，people wrote about 36 words per minute.Those tested made a typing mistake 2.3 percent of the time.The researchers noted that 36 words per minute is about 25 percent slower than the average rate for people using a computer keyboard.In a 2018 《全效作业本》 英语 必修 第二册 [RJ] study，the average speed for computer typists was about 52 words per minute. Seventy－five percent of those taking part in the study had typing speeds below 44 words per minute.But the fastest phone typists reached speeds of over 80 words per minute.The published results showed there was no difference between males and females in the typing speeds.Subjects who reported using two thumbs or two fingers reached speeds of 38 words per minute.Those who said they used only one finger typed 29 words per minute. 《全效作业本》 英语 必修 第二册 [RJ] The researchers noted one reason for the narrowing of speed rates between smartphones and computers.They said people have become slower at typing on keyboards over the years.The researchers call the difference between