(完整word版)粤教版小学科学五年级下册复习资料.pdf

粤教版小学科学五年级下册复习资料第 1 课 地球1 1519 年，葡萄牙航海家（麦哲伦）率领船队，用（3）年的时间完成了第一次环绕地球的航行，从而直接证明了(地球是个球体)。2地球的赤道周长约(40000)千米。地球的直径约为(12800)千米。半径约为(6400)千 米。3海洋面积约占地球表面积的(71)，陆地面积约占地球表面积的(29)。4 根据地震波的数据，科学家推测地球内部由(地壳)、(地幔)和(地核)三个部分组成。5世界第一高峰珠穆朗玛峰高（8844.43）米。617 世纪末，英国科学家牛顿研究了地球自转对地球形状的影响，从理论上推测地球不是一个很圆的球体，而是一个（赤道处）略为隆起，（两极）略为扁平的椭球体。7地球的赤道周长约(40000)千米，飞机以每小时800 千米的速度飞行，绕赤道一周大约需要（两）天的时间。第 2 课 太 阳1太阳照耀着大地，给地球带来了(光)和(热)。太阳每分钟向地球传输的能量相当于燃烧(4 亿)吨烟煤放出的热量。2太阳的核心部分直径不到50 万千米，温度高达(1500 万)摄氏度，而且压力极大。第 3 课月球1月相变化的原因是(月球围绕地球在公转)。2(1969)年(7)月(20)日，美国(“阿波罗11 号”)宇宙飞船经过4 天多的飞行，终于降落月球，宇航员(尼尔阿姆斯特朗)迈出的一小步成为人类历史的一大步。3月球体积不足太阳体积的六千万分之一。(月球)是地球的卫星，约(30)天绕地球公转一周。也就是我们平时我们说的一天。4在茫茫宇宙中，月球）是地球最近的“邻居”（，也是人类探测与研究程度最高的地外星球。第 4 课 白天与黑夜1地球是围绕太阳运转的一颗行星，地球在围绕太阳运转的同时也在(自转)。地球自转一周约(24)小时，也就是我们说的一天。2昼夜交替现象的原因是(地球在自转)。3公元15 世纪前后，人们逐渐开始怀疑“地心说”。波兰天文学家（哥白尼）提出（“日心说”）的理论，第一次科学地论述了昼夜变化是由（地球自转）引起的。4中国北京正午12：00，德国柏林凌晨（6：00），6，美国纽约半夜（11：00）13 5 昼夜变化对动植物的影响如：睡莲）（一般在清晨开放，昙花）（总是在夜晚开放；猫（头鹰）白天睡觉，夜晚出来捕食，（鸡）白天活动，夜晚休息。（合欢）的叶子在白天张开，而在夜晚闭合。第 5 课 春夏与秋冬1.地球表面的热量主要来自（太阳）。人们冬天喜欢阳光，夏天尽可能躲在阴凉处，太阳本身发光的强弱是（不变）的。2.太阳光照射地面的角度在（早晨）和（中午）有明显的不同。同样是正午，一年中不同的季节也有明显的差异，文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 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ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8有的地方甚至会出现（阳光直射）的情况。3.地球以（一年）为周期围绕（太阳）公转。由于地球始终是（倾斜着身子）在公转，所以对某一地区来说，每年夏季和冬季太阳光照射地表的角度就出现了明显的差异。（冬季）阳光斜射着我们，（夏季）阳光几乎直射着我们。4.季节交替使自然界更加五彩缤纷，一些植物每年秋天都会落叶，在来年的春天又长出新叶。一些动物，如（熊）、（蝙蝠）、（松鼠）等，它们在冬天要睡很长的时间。5.花生种子具有很高的营养价值，含有丰富的（脂肪）和（蛋白质）。从花生种子中提取的（油脂）就是我们经常食用的花生油。第 6 课 网络课堂1.我国传统上以（立春）、（立夏）、（立秋）和（立冬）划分四季。第 7 课种子1菜豆种子结构包括（胚）和（种皮），胚又包括（胚轴）（胚芽）（胚根）、和（子叶）。2种子萌发的环境条件是：适宜的温度）（水分）（空气）3选两株刚出土的菜豆幼苗，一株去除子叶，一株保留子叶。一周后，保留子叶的豆苗长得壮，去掉子叶的豆苗长得瘦小，说明子叶里含有丰富的（营养成分）。第 8 课 植物长大了1植物生长过程中会有很多变化，比如植株升高、叶子变多等，我们可以用（测量）（统、计）等方法记录这些变化。文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 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ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J82从（种子）萌发到长出（幼苗）开始，到这株植物（开花）（结果）、，繁育出（种子），这株植物就完成了一个生长周期。3植物的生长分为（种子）（幼苗）（开花）（结果）四个阶段。第 9 课 养蚕1蚕和很多动物一样，生命都是从（卵）开始的。2在（2025 ）的条件下，蚕卵一般经过（10）天左右就可以孵化出蚕。3刚孵出的蚕叫（蚁蚕）。蚁蚕生长几天后就要（蜕皮）。蜕皮后，蚁蚕就变成了二龄蚕。蚕幼虫在生长过程中要蜕（四）次皮，最后变成（五龄）蚕。4五龄蚕经过几天的生长以后，就要（吐丝结茧）了。蚕的（幼虫）吐丝结茧以后，就进入一个新的生长阶段（蛹）。5 蚕结茧（1015）天后，（蛹）在茧里变成（蛾）。蚕蛾破茧而出后，雌蛾与雄蛾交尾，并产下（蚕卵）。6 蚕的一生要经过的阶段有：蚕卵）（幼虫）（蚕蛹）（蚕蛾）（蚕 卵）。7 蝴蝶等昆虫一生要经过的阶段有：卵）（幼虫）（蛹）（蛾）（卵）（。8两栖类青蛙的一生要经过的阶段有：卵）（蝌蚪）（青蛙）（卵）。第 10 课 我们在成长1从出生到长大，我们每个人的身体都会有很大的变化。变化的过程反映了人（生长发育）的规律。少年儿童在成长的过程中，不但（外貌）会发生变化，身高）和（体文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 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ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8重）（也会发生明显的变化。2人的生长发育有一定的规律，女孩在（911）岁男孩在（1113）岁，生长发育开始进入一个（高峰期）。在这个（高峰期）中，男孩每年可增高（79）厘米，女 孩每年可增高（57）厘米；体重平均每年可增加（56）千克。3 从出生到现在，我们经历了（婴儿）（幼年）（儿童）等几个阶段，将来我们还、要经历人生的其它阶段。4 由于青少年的骨骼弹性比较大，容易变形，因此应保持正确的（坐）、立）（、行走）（姿势，积极参加（体育锻炼）。这些都有助于身体的健康成长。3如果要你说出哪些动物食量最大，很多人都会想到大象或鲸。但一头大象每天吃约（200）千克的食物，只相当于它的体重的1/25；一只老鼠每天需要（10）克左右的食物，却相当于其体重的1/4；而一只体重只有3 克的蜂鸟每天要吃掉和其身体一样重的食物。4所以，相对来讲，小动物的食量（反而更大）。为什么会出现这样的现象呢？原来动物（恒温动物）越小，每日每克体重消耗的（热量）就越多，只有吃（更多的食物）才能满足自身的需要。5（鳙鱼）（鲢鱼）（草鱼）（青鱼）是我国淡水养殖的“四大家鱼”、，它们的（食性）各不相同。根据这种特性，人们常把它们“混合放养”。6 鳙鱼、鲢鱼、草鱼、青鱼这几种鱼在水中栖息的水层和食性各不相同。（鳙鱼）和（鲢 鱼）都生活在水的上层，鳙鱼）主要以浮游动物为食；鲢鱼）主要以浮游植物为（食。草鱼）主要生活在水的中层，以（水草）为食。青鱼）生活在水的底层，（主要以螺蛳、蚬等软体动物为食。文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8第 11 课 植物生长靠什么1土壤里含有植物生长所需要的（养分）。这些养分有的来自于（动物的遗体），有的是人们添加进去的，（化肥）如、农家肥）还有的是土壤中本来存在的（等，（矿物质）。这些养分溶解在水中，被植物吸收。2蒸馏水和过滤后的土壤浸制液看上去虽然都是澄清透明的，但它们并不完全一样。取几滴澄清的土壤浸制液，放在干净的载玻片上，用酒精灯加热，将水分全部蒸发。观察载玻片上留有白色痕迹。而取几滴蒸馏水，重复上面的实验，观察载玻片上没有痕迹。说明土壤浸制液里有（矿物质），而蒸馏水中却没有（矿物质）。3植物通常生长在（土壤）中。根据土壤的成分，一般把土壤分为（壤土）（黏土）、和（砂土）。4 壤土）能保水保肥，养分丰富；黏土）能保水保肥，养分较丰富，但透气透水性差；（砂土）保水保肥能力差，养分较少。5除了（水分）和（养分）外，阳光）（空气）（温度）等也会影响植物（、的生长。6植物的生长离不开（阳光）。人们发现，在植物生长的过程中，如果阳光不够充足，植物的茎叶朝向阳光更（充足）的地方生长。这就是植物生长的（向光性）。第 12 课 动物为什么要吃东西1动物要生存，就必须要吃（食物）。不同的动物吃的食物可能不同。根据动物的（食性）不同，可以把动物分为（植食性动物）（肉食性动物）和（杂食性动物）、。2植食性动物有（兔子）（鹿）（松鼠）等；肉食性动物有（蛇）（老虎）、（狮子）等；杂食文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8性动物有（鸟）（狐狸）（浣熊）等。、第 13 课 植物繁殖的奥秘1 很多植物生长到一定的阶段通常就会（开花结果）果实里有植物的下一代，（种子）。（种子）与（花）和（果实）一样，都是植物的（繁殖器官）。2雌蕊被摘的花，子房不膨大，而雌蕊完好的花，子房膨大，慢慢变成果实。结论：雌蕊在植物繁殖过程中有很大作用（授粉）。3植物的花粉从（雄蕊）传播到（雌蕊）上就叫（传粉）。如果人工帮助植物传粉，常常能使植物结出更多的果实。4植物的传粉，常常依靠（风）和（昆虫）。依靠（风力）传粉的花叫（风媒花）。（风媒花）一般都很小，不艳丽，没有香味和花蜜，如（玉米）的花。依靠（虫媒）传粉的花叫（虫媒花）（虫媒花）一般较大，通常比较鲜艳，并有香味和花蜜，如，（桃）（杏）（梨）（苹果）的花，都是虫媒花。、5不同的种子离开植物“妈妈”的方式各不相同，有的长着“翅膀”，风一吹就飞走了；有的身上长刺，可以粘在动物的皮毛上，被动物带走。还有借助（水力）传播和（自身弹力）传播。6植物除了用（种子）繁殖外，还可以用（根）（茎）（叶）等营养器官来繁、殖。7工厂里的香蕉苗是通过组织培养中的（试管苗）技术进行快速繁殖的。8植物的种子的传播途径有（风力传播）（动物传播）（自身弹力传播）（水力、传播）等。文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 ZE3O2M4H5J8文档编码:CZ3I10A9I8U1 HU4X7D8Y1V6 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