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longman science 3B 01

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[00:00.00]1  SEEDS
[00:04.35]种子
[00:08.70]Put a seed in wet soil.Will it grow into a new plant?
[00:14.08]把一粒种子放在湿土壤里。它会长成一棵新的植物吗?
[00:19.46]FINDING OUT
[00:21.22]找出
[00:22.99]1. Put a broad bean in water for two days.Take off its seed coat.
[00:28.51]把一粒蚕豆放进水里两天,剥掉种皮。
[00:34.04]Look at the seed.
[00:36.36]观察种子
[00:38.69]seed coat       seed leaf      young stem      young root
[00:43.26]种皮            种子           种芽            胚根
[00:47.83]2.Put two broad beans,A and B,in water for two days.
[00:51.85]把A和B两粒蚕豆放进水里两天。
[00:55.88]Cut off the young root and young stem from bean B.
[00:59.15]将蚕豆的胚根和胚芽割下了。
[01:02.43]Then put the two beans in a glass with some wet cotton wool.
[01:05.55]然后把两粒蚕豆放装有湿棉花布的玻璃杯里。
[01:08.68]Watch how they grow after a few days.
[01:11.21]观察它们几天后怎样成长?
[01:13.74]broad bean A      broad bean B           after a few days
[01:18.28]蚕豆A  蚕豆B      若干天后
[01:22.81]Which broad bean grows into a new plant after a few days?
[01:25.89]哪粒蚕豆在若干天后会长成一棵新的植物?
[01:28.97]3.Watch carefully to see how the broad bean grows into a new plant.
[01:33.45]仔细观察,看蚕豆在若干天后怎样成长为新植物。
[01:37.93](a)What does the young stem grow into?
[01:40.45]胚芽会长成什么?
[01:42.97](b)What does the young root grow into?
[01:45.80]胚根会长成什么?
[01:48.62](c)What will the seed leaves become?
[01:51.35]胚叶会长成什么?
[01:54.08]4.Look at the corn and the broad bean.How are they different?
[01:58.31]观察玉米和蚕豆,它们有什么不同之处?
[02:02.54]fruit wall and seed coat
[02:04.56]外壳和种皮
[02:06.59]seed leaf      young stem        young root
[02:09.97]种叶           胚芽              胚根
[02:13.36]corn           seed leaves       young root
[02:16.79]玉米           种叶              胚根
[02:20.23]young stem     seed coat         broad bean
[02:24.00]胚芽           种皮              蚕豆
[02:27.77]MAIN POINTS
[02:29.36]要点
[02:30.94]A seed has a seed coat and a baby plant.
[02:33.77]一粒种子由种皮和胚胎组成。
[02:36.60]A baby plant has a young stem,a young root and seed leaves.
[02:40.47]胚胎由胚芽,胚根,和胚叶组成。
[02:44.34]It uses up food whcih helps the seed to grow into a new plant.
[02:47.30]它会消耗帮助种子成长的养料。
[02:50.27]ACTIVITIES
[02:51.90]活动
[02:53.53]1.Have you seen the seeds in the picture below?
[02:56.61]你看过下列图中的种子吗?
[02:59.70]Write their names in the boxes.
[03:01.73]在框里写出它们的名字。
[03:03.77]dry seed       after putting in water...
[03:06.50]干种子         放进水里后
[03:09.23]after taking away the seed coat...
[03:11.36]剥掉种皮后
[03:13.49]young root     young stem        young stem      young root
[03:17.76]胚根           胚芽              胚芽            胚根
[03:22.03]2.Put three grains of corn into water for one day.
[03:26.35]将三粒玉米种子放进水里一天。
[03:30.68]Place them in a dish.With wet cotton.
[03:33.16]然后把它们放置在装有湿棉花的碟子里。
[03:35.64]Watch how they grow after a few days.Then fill in the boxes below.
[03:39.38]观察它们在若干天后怎样成长。然后在下图的方框中填空。
[03:43.11]after a few days
[03:46.04]若干天后

责编:Heaven

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