全新版大学英语听说教程第三册听力原文unit

全新版大学英语听说教程第三册听力原文unit内容摘要：

thanded people find that being lefthanded is at least a small disadvantage and a minor source of frustration in their lives. There are many things that righthanded people take for granted that are quite difficult for lefthanders. These include many basic skills like learning to write, learning to use scissors and other hand tools and utensils, and learning various crafts and other activities. Sometimes lefthanders are puzzled by equipment designed for righthanders, and other times they are confused by instructors and instructions geared toward teaching righthanders. For some lefthanded people this amounts to occasional difficulties and minor inconveniences. For other lefthanders it is a lifetime full of failures and frustrations that may lead to much more serious problems. Questions: 1. What is the speaker39。 s attitude toward lefthanders? 2. What can be inferred from the passage about righthanders? 3. How do the majority of lefthanders feel about their lefthandedness? Part C Lefthandedness and Righthandedness in Babies Approximately 90% of people in the world are naturally righthanded. Why is this so, and are we born one way or the other? The answer to this question is rather plicated. In babies and young children, no single side bees dominant until around the age of eight. At 12 weeks, babies usually use both hands equally, but by 16 weeks, they mostly use the left hand for touching. By 24 weeks, they have changed again and start using。