阅读理解

   Everybody wants to be healthy. You know food is very important. There are lots of healthy food. You can have more bananas, apples, oranges, tomatoes and lettuce because fruit and vegetables are good for you. But don’t eat too much chocolate. It’s not healthy food. Healthy food can make you grow (生长) and make you strong（强壮的） and happy. Remember there is a saying—“An apple a day keeps the doctor away（远离）”. Sports can also keep you healthy. Get up early and do some sports every day. Don’t be lazy（懒惰的）. You will be healthy and happy.

对于g=9.8N/kg的理解正确的是（）

根据下面的一段文字,给“拍客”下定义。不超过40字。

互联网时代出现了这样一群人:他们有社会责任感和爱心,眼界开阔,留意生活中的点点滴滴,从中择取社会“热点”,用手机、数码相机或数码摄像机等数码设备拍下图像或视频,用来表达对百姓生活和人文历史的理解与思考,然后以发送彩信或电子邮件的方式,上传到网络分享、传播。他们被称作“拍客”。成为“拍客”,不需要高超的摄影技术,妇孺皆可,老少皆宜。