{"show":[{"id":478,"catid":"5890,92803,5888","title":"水的组成和主要性质","subtitle":"水的组成和主要性质","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/6.png","goals":null,"intro":"水是由氢、氧两种元素组成的无机物,化学符号为H2O,常温常压下为无色无味的透明液体。","ratingnum":0,"rating":0,"hits":19,"teachername":"张思颖","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1476935752,"updatedtime":1496210645},{"id":446,"catid":"92808,44499,44500","title":"增强节约用水的意识和防止水污染的责任感","subtitle":"增强节约用水意识和防止水污染","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/1.png","goals":null,"intro":"水对我们的生命起着重要的作用 ,它是生命的源泉。节约用水,从我做起","ratingnum":0,"rating":0,"hits":18,"teachername":"张思颖","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1476932213,"updatedtime":1496210613},{"id":448,"catid":"92806,77790","title":"溶质的质量分数的变化","subtitle":"溶质的质量分数的变化","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/1.png","goals":null,"intro":"影响溶质质量分数的因素是溶质、溶剂的质量,与温度、是否饱和无关。","ratingnum":0,"rating":0,"hits":18,"teachername":"张思颖","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1476932321,"updatedtime":1496210497},{"id":2040,"catid":"92806,77790","title":"溶质的质量分数的改变方法","subtitle":"溶质的质量分数的改变方法","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/2.png","goals":null,"intro":"改变溶质质量分数的方法有改变溶剂的量、改变溶质的量。","ratingnum":0,"rating":0,"hits":16,"teachername":"张思颖","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1481090395,"updatedtime":1496210468},{"id":2041,"catid":"92806,77790","title":"饱和溶液的质量分数","subtitle":"饱和溶液的质量分数","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/3.png","goals":null,"intro":"饱和溶液的质量分数取决于溶解度的大小。","ratingnum":0,"rating":0,"hits":17,"teachername":"张思颖","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1481090472,"updatedtime":1496210432},{"id":2367,"catid":"5692","title":"生活用品与大气压","subtitle":"生活用品与大气压","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/5.png","goals":null,"intro":"在日常生活中,很多用品是利用大气压力挤去物品中的空气,以缩小体积或隔绝空气。\r\n","ratingnum":0,"rating":0,"hits":11,"teachername":"董超","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":518,"createdtime":1490754097,"updatedtime":1496206896},{"id":472,"catid":"5692,5923","title":"大气压与人类生活","subtitle":"大气压与人类生活","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/5.png","goals":null,"intro":"大气压的变化对人体有一定的影响。人体对大气压的变化有一个适应的过程,短时间内气压差过大,易出现不适症状,如高原地区戴着氧气瓶的旅客,从高原地区到平原的醉氧症者等。\r\n\r\n","ratingnum":0,"rating":0,"hits":17,"teachername":"董超","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1476934607,"updatedtime":1496206850},{"id":1898,"catid":"5923,5692,44443,44444","title":"大气压对天气的影响","subtitle":"大气压对天气的影响","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/3.png","goals":null,"intro":"在不同高度,大气压随高度增加而减少;在同一高度,不同地区的大气压不一定相同,气流会从高压区流向低压区;即使在同一地区,由于温度、湿度、时间的变化,大气压也不一定相同。\r\n","ratingnum":0,"rating":0,"hits":19,"teachername":"董超","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"11522","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1478681473,"updatedtime":1496203136},{"id":1667,"catid":"92804,5928","title":"浮力的变化","subtitle":"浮力的变化","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/1.png","goals":null,"intro":"本节主要介绍运用阿基米德原理来探讨影响浮力大小变化的因素。","ratingnum":0,"rating":0,"hits":27,"teachername":"董超","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477616876,"updatedtime":1496202411},{"id":2376,"catid":"92817,44552,95531","title":"电路的基本组成","subtitle":"电路的基本组成","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/scientific/1.png","goals":null,"intro":"电路由用电器、电源、开关和导线四部分组成。","ratingnum":0,"rating":0,"hits":31,"teachername":"董超","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":5,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":518,"createdtime":1490757156,"updatedtime":1496202377}],"xdxk":{"2648":{"name":"小学数学","xd":1,"xk":3},"467":{"name":"初中数学","xd":2,"xk":3},"215":{"name":"初中英语","xd":2,"xk":4},"394":{"name":"初中科学","xd":2,"xk":5},"226":{"name":"初中物理","xd":2,"xk":6},"534":{"name":"初中化学","xd":2,"xk":7},"660":{"name":"初中历史与社会","xd":2,"xk":20}},"count":"74","catname":{"478":"初中科学","446":"初中科学","448":"初中科学","2040":"初中科学","2041":"初中科学","2367":"初中科学","472":"初中科学","1898":"初中科学","1667":"初中科学","2376":"初中科学"},"ispay":{"478":0,"446":0,"448":0,"2040":0,"2041":0,"2367":0,"472":0,"1898":0,"1667":0,"2376":0},"fmtime":{"478":"2017-05-31 14:04","446":"2017-05-31 14:03","448":"2017-05-31 14:01","2040":"2017-05-31 14:01","2041":"2017-05-31 14:00","2367":"2017-05-31 13:01","472":"2017-05-31 13:00","1898":"2017-05-31 11:58","1667":"2017-05-31 11:46","2376":"2017-05-31 11:46"},"videonum":{"478":1,"446":1,"448":1,"2040":1,"2041":1,"2367":1,"472":1,"1898":1,"1667":1,"2376":1},"pages":"
","page_items":"\n3/8"}