Last month I attended a lecture delivered by Professor Zhang, a health expert, with the theme of “sitting for too long is bad for people's health”. From the lecture I learned that with the development of TV and computer, people today sit down more than ever before in history, which has a bad effect on their health. Not only can this habit make your neck or back ache, but it may also make your fat, increase the risk of heart disease and even death. To prevent these problems from happening, Professor Zhang pointed out that those who sit too much, such as students and office workers, should form some good habits in life, such as going to school or work on foot or by bike rather than by car, taking the stairs instead of the elevator and standing while talking on the phone. He particularly reminded us that we students should stand up to do some activities during break time at school.
最新问答： 半圆的周长为51.4厘米，它的面积是______平方厘米． 你永远不会明白,用英语怎么说 能使双缩脲试剂发生紫色的是什么物质? 把6molCu粉投入含8molHNO3和2molH2SO4的稀溶液中，则标准状况下放出的气体的物质的量为______． 六年级上册数学黄冈小状元达标卷 答案 被子植物吸收水分的主要器官是?部位主要是?该部位含有大量的? 如图，在两块完全相同的正方形钢板上冲制小圆片，甲钢板上冲制了4个，乙钢板上冲制了9个．剩下的边角料哪一块多？为什么？ 商店运来三种水果,其中梨的重量占20%.苹果的重量和其他两种水果重量之和的比是1:3，香蕉有220千克求共运来水果多少千 Matlab如何计算多项式矩阵的乘积 英语翻译凤求凰·琴歌 有美人兮,见之不忘.一日不见兮,思之如狂.凤飞翱翔兮,四海求凰.无奈佳人兮,不在东墙.将琴代语兮, 3□6×6，□里填______积最接近1800，□填______积最接近2400． 如图,在平行四边形ABCD中,已知角ODA=90°,AC=12,BD=8,求AD和CD的长 同一种商品，甲店比乙店的进货价便宜10％，甲店按20％的利润定价，乙店按15％的利润定价，甲店的定价比乙店便宜11.2元 英语喂鸡feed chicken中间要不要加the 有一块平行四边形的菜地,底边长80米,如果平均每平方米收青菜5千克,这块地可以收青菜多少千克? 《老子》曰：“祸兮，福之所倚；福兮，祸之所伏。”它包含了老子 [ ] A 写一件快乐的事怎么写作文怎么写 若关于x的方程(m+1)x的平方+2mx+1=0,则m= 长江和黄河都发源于()()都注入()长江发源于()山脉,注入()海,全长()千米 找规律填空：1/3,1/2,5/9,7/12,3/5,（）
