及第四段copyandpaste'cultureisgettingpopular.Peoplesimplypickupexpressionsfromtheinternetwithoutmuchthought.(复制粘贴文化越来越流行。人们只是不假思索地从互联网上获取表情。)可知第三段和第四段主要讲述人们的新的沟通习惯。故选A。(4)细节理解题。根据第五段Whenweuseexpressionswithoutthinking,itmeanswehave...