题目

I am 15.Now I’m studying English in London.I want to invent a language machine that can help me understand as many languages as possible.Marie,FranceI am 13.I dream of going to a top university after I graduate.I want to be a reporter in the future.Michiko,JapanI am a 12-year-old girl.I like traveling very much.How I wish to visit Egypt some day!Masha,RussiaI’m a 16-year-old girl in Tibet (西藏).The Qinghai Tibet Railway has been built.I’ll be able to reach Beijing by train in about 48 hours.My dream is to visit Beijing.Joma,ChinaI am 14 years old.I dream of inventing a machine that ca12．为了不妨碍他人正常地学习和工作，应该控制噪声不超过（　　）A．30分贝B．50分贝C．90分贝D．70分贝