{"show":[{"id":598,"catid":"9841,12391,91590","title":"常用仪器的名称和选用","subtitle":"常用仪器的名称和选用","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/5.png","goals":null,"intro":"用于加热的仪器:试管,用作少量试剂反应容器,在常温或加热时使用;作为小型气体发生器,收集少量气体;蒸发皿,用于溶液的蒸发、浓缩。\r\n\r\n\r\n\r\n","ratingnum":0,"rating":0,"hits":60,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1476953946,"updatedtime":1495861551},{"id":617,"catid":"91771,77233,77234,12416,91594,91595,91602,91607,46153","title":"化学的历史发展过程","subtitle":"化学的历史发展过程","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/3.png","goals":null,"intro":"化学的历史渊源非常古老,可以说从人类学会使用火,就开始了最早的化学实践活动。","ratingnum":0,"rating":0,"hits":65,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477009941,"updatedtime":1495861450},{"id":618,"catid":"9799,91771,91588,12389","title":"化学的研究领域","subtitle":"化学的研究领域","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/3.png","goals":null,"intro":"什么是化学?化学是一门研究物质的组成、结构、性质及变化规律的自然科学,这是化学变化的核心基础。","ratingnum":0,"rating":0,"hits":68,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477009960,"updatedtime":1495861428},{"id":619,"catid":"91771,91588,12389","title":"化学的用途","subtitle":"化学的用途","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/5.png","goals":null,"intro":"1.化学在保证人类的生存并不断提高人类的生活质量方面起着重要作用,如利用化学生产化肥和农药,以增加粮食产量;2.化学是一门实用的学科,它与数学物理等学科共同成为自然科学迅猛发展的基础。","ratingnum":0,"rating":0,"hits":60,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477009980,"updatedtime":1495861311},{"id":621,"catid":"9799,9840,12390,91589","title":"蜡烛燃烧实验","subtitle":"蜡烛燃烧实验","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/4.png","goals":null,"intro":"从蜡烛燃烧实验可知,石蜡为白色固体,硬度较小,加热可熔化、汽化,能在空气中燃烧,生成水和二氧化碳。","ratingnum":0,"rating":0,"hits":49,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477010007,"updatedtime":1495857508},{"id":2295,"catid":"91589,12390","title":"学习化学的重要途径及学习方法","subtitle":"学习化学的重要途径及学习方法","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/4.png","goals":null,"intro":"学习化学的重要途径是实验,通过实验以及对实验对象的观察,准确描述和分析等,可以发现和验证化学原理,学习科学探究的方法并获得化学知识。","ratingnum":0,"rating":0,"hits":16,"teachername":"张璐璐","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":518,"createdtime":1490080927,"updatedtime":1495857212},{"id":623,"catid":"91595,77234,91602,91607","title":"化学常识","subtitle":"化学常识","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/3.png","goals":null,"intro":"1.常见固体的颜色,如紫黑色固体:高锰酸钾;2.常见液体的颜色,如蓝色溶液:硫酸铜溶液;3.常见气体的颜色,如红棕色气体:二氧化氮。\r\n\r\n\r\n","ratingnum":0,"rating":0,"hits":101,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477010038,"updatedtime":1495856907},{"id":624,"catid":"9802,9843,12398,12478,30924,89321,91778,28850,91602","title":"空气的成分及各成分的体积分数","subtitle":"空气的成分及各成分的体积分数","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/3.png","goals":null,"intro":"空气是一种由多种气体组成的混合物,其主要成分有氮气、氧气、二氧化碳、水蒸气、稀有气体等。","ratingnum":0,"rating":0,"hits":56,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"9774","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477010053,"updatedtime":1495856738},{"id":2297,"catid":"9843,12398,12479,30924,89321,91778,28850,91602","title":"空气组成的测定","subtitle":"空气组成的测定","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/2.png","goals":null,"intro":"在集气瓶内加入少量水,并将水面上方空间分为5等份,用弹簧夹夹紧胶皮管,点燃燃烧匙内的红磷后,立即伸入瓶中并在塞子塞紧,观察红磷燃烧的现象。","ratingnum":0,"rating":0,"hits":17,"teachername":"张璐璐","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":518,"createdtime":1490083167,"updatedtime":1495856684},{"id":627,"catid":"9802,9843,12398,12478,30924,89321,91778,28850,91602","title":"空气对人类生活的重要作用","subtitle":"空气对人类生活的重要作用","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/chymistry/1.png","goals":null,"intro":"空气对人类生活意义重大,是地球上动植物生存的必要条件,动物呼吸、植物光合作用都离不开空气;大气能阻挡来自宇宙空间的各种射线,保护地球生物免受伤害。","ratingnum":0,"rating":0,"hits":56,"teachername":"张璐璐","publisheruid":0,"uid":82,"xd":2,"deletedtime":null,"xk":7,"nj":null,"ver":"9774","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":518,"createdtime":1477011024,"updatedtime":1495856416}],"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":"151","catname":{"598":"初中化学","617":"初中化学","618":"初中化学","619":"初中化学","621":"初中化学","2295":"初中化学","623":"初中化学","624":"初中化学","2297":"初中化学","627":"初中化学"},"ispay":{"598":0,"617":0,"618":0,"619":0,"621":0,"2295":0,"623":0,"624":0,"2297":0,"627":0},"fmtime":{"598":"2017-05-27 13:05","617":"2017-05-27 13:04","618":"2017-05-27 13:03","619":"2017-05-27 13:01","621":"2017-05-27 11:58","2295":"2017-05-27 11:53","623":"2017-05-27 11:48","624":"2017-05-27 11:45","2297":"2017-05-27 11:44","627":"2017-05-27 11:40"},"videonum":{"598":1,"617":1,"618":1,"619":1,"621":1,"2295":1,"623":1,"624":1,"2297":1,"627":1},"pages":"
","page_items":"\n4/16"}