2022年冀教版二年级数学下册单元知识点归纳 .pdf

第 1 页/共 5 页冀教版二年级数学下册单元知识点归纳（1-7 单元）第一单元长度单位1.常用的长度单位是米、分米、厘米。米可以用字母“m”表示；分米可以用字母“dm”来表示；厘米可以用字母“cm”来表示。2.测量较短的物体通常用厘米作单位，测量较长物体通常用米做单位。3.米、分米和厘米的关系:1 米10分米 1分米10 厘米1 米10分米100厘米4.线段（1）线段的特点:线段是直的；线段有两个端点；线段有常有短，是可以量出长度的。（2）测量物体长度的方法:物体的左端对准直尺的“0”刻度，看物体的右端对着直尺上的刻度是几，这个物体的长度就是几厘米。（3）测量物体的长度时，当不是从零刻度量起时，要用终点的刻度数减去起点的刻度数。（4）画线段的方法:先用笔对准尺子的“0”，刻度，在它的上面也点一个点，再对准要画到的长度的厘米刻度。在它的上面也点一个点，然后把这两个点连起来。第二单元有余数的除法1.一个整数除以另一个不为零的整数，得到整数商以后还有余数，第 2 页/共 5 页这样的除法叫做有余数的除法。2.215=41 读作:21 除以 5 商 4 余 1 3.在有余数的除法中，余数都比除数小。4.利用口诀求商:除数是几，就根据和几有关的乘法口诀求商。5.有余数的除法应用题一定要在商和余数的后边都带上单位名称。6.在有余数的除法中，被除数商除数余数。7.（1）17 名同学去划船每条船最多只能坐四人，至少要租（5）条船。（进一法）（2）20 米布，每 6 米做一套衣服，可以做（3）套衣服。（去尾法）第三单元认识 1000 以内的数1.数数的方法:数比较大时可以一百一百的数，十个十个的数，零散的在一个一个的数，要根据具体的数用不同的方法数数。2.十个一是十，十个十是100，10 个 100 是 1000。3.一个数从右边起，第一位是个位，第二位是十位，第三位是百位，第四位是千位。4.1000 以内数的组成:百位上的数字表示几个百，十位上的数字表示几个十，个位上的数字表示几个一。5.读数的方法:从最高位读起，百位上是几读几百，十位上是几读几十，个位上是几就读几。中间有零，读作零，末尾的零不读。6.写数的方法:哪一位上有几就在哪一位上写几，哪一位上一个文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4第 3 页/共 5 页数也没有就在哪一位上写0，0 起占位的作用。7.数的大小比较的方法:位数多的大于位数少的数；位数相同时，就比较最高位上的数字，数字大的这个数就大，反之就小；如果最高位上的数字相同，就比较下一位上的数，依次类推。8.最大的一位数:9 最小的一位数:1 最大的两位数:99 最小的两位数:10 两位数最高位是十位。最大三位数:999 最小三位数:100 三位数，最高位是百位。最大四位数:9999 最小四位数:1000 四位数最高位是千位。9.算盘上每一档代表一个数位，计数时可在算盘上任选一挡作各位。算珠都靠框时，表示算盘上没有拨上数。计数时，拨珠靠梁，一个下珠表示 1，一个上珠表示 5。第四单元千克和克1.我们常用台秤和电子秤来测量物体有多重，剂量比较轻的物品的质量，用“克”作单位。克用字母“g”来表示，计量比较重的物品的质量用千克作单位。千克用字母“kg”表示。2.1 千克 1000克第五单元四边形的认识1.四边形的特征:四边形有四条边，四个角。2.长方形的特征:长方形的对边相等，四个角都是直角，长方形文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4第 4 页/共 5 页长边的长叫做长，短边的长叫做宽。3.正方形的特征:正方形四条边相等，四个角都是直角，正方形每条边的长叫做边长。4.行四边形的特征:平行四边形对边相等。且平行，易变形。第六单元三位数加减三位数1.三位数加减法，三位数的笔算方法:（1）笔算加法:相同数位对齐，从个位加起，哪一位上的数加满几十，就向前一位进几。（2）笔算减法:相同数位对齐，从个位减起，哪一位上的数不够减，就从前一位退1 当 10，和本位上的数相加后再减。2.三位数加减三位数的验算方法:（1）加法的验证方法一:和减一个加数等于另一个加数；方法二:交换两个加数的位置再加一遍。（2）减法的验算方法一:差加减数等于被减数；方法二:被减数减差等于减数。3.在一个算式里，如果只有加减法，要按从左到右的顺序计算，如果有括号，要先算括号里面的。4.解决两步计算的问题，可以从已知条件入手，明确先求什么再求什么；也可以从问题入手，明确要求什么，必须先知道什么。第七单元时分秒1.钟面上有 12 个大格，60 个小格，时针走一大格的时间是1 小时，分针走一小格的时间是1 分钟。走一大格是 5 分钟，走一圈是 60文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4第 5 页/共 5 页分钟，时针走一大格，分针正好走一圈，是60 分钟，所以，1 小时60 分钟。2.钟面上的时针刚走过数字，分针从12 时起走了多少个小格，这时的时刻就是几时过几分，读作:几时几分。文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4文档编码:CY1Q6H4O8N10 HT1O10Y4L10O6 ZC7Y4B5V2F4