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剪取一段带叶枝条下端插在滴有红墨水的水中．等看到叶脉微红后把茎横切切面如图1所示问a在茎的横切面上 显示为红色．这一现象 Template






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sketch 3208 ELETR by Raimundo Santos
sketch 1614 uncle bun
sketch 846 cat fridayz z z zzzz zz
sketch 4 Nirvana Smiley
sketch 3290 Calvin and Hobbes by অনন্ত জলিল
sketch 3420
sketch 508
sketch 12 my bear

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sketch 4979 Luffy
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sketch 4522 Adventure Time by KiNg Buamir
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sketch 3572 Hate mondays by Malyi Link
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sketch 2740 Monster by Gabriela Segura
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tomski剪取一段带叶枝条下端插在滴有红墨水的水中．等看到叶脉微红后把茎横切切面如图1所示问a在茎的横切面上 显示为红色．这一现象 coloring
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见下图剪取一段带叶的木本植物枝条把下端插入稀释了的红墨水中过一段时间当看到叶脉微红以后把这个枝条纵切和横切用放大镜观察哪一部分被 sketch template
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取一段木本植物的茎将其下端插入滴有红墨水的水中经过一段时间后枝条的一部分会变红变红的部位是A 皮 B 所以浸入水中茎的部分C sketch template
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学校生物兴趣小组的同学将一株在暗中放置了两天的绿色开花植物剪取一段枝条插入盛有已稀释的红墨水的广口瓶中将它放在阳光下对其代谢进行研究 sketch template
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剪取一段带叶枝条下端插在滴有红墨水的水中．等看到叶脉微红后把茎横切切面如图1所示问a在茎的横切面上 显示为红色．这一现象 sketch template
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某同学在做探究茎对水分和无机盐的运输的实验时进行了如下操作取一新鲜带叶的丁香枝条将其下端插入装有红色溶液的锥形瓶中然后放在温暖阳的 sketch template
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见下图剪取一段带叶的木本植物枝条把下端插入稀释了的红墨水中过一段时间当看到叶脉微红以后把这个枝条纵切和横切用放大镜观察哪一部分被 sketch template
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把一段带叶的茎的下端插入装有稀释红墨水的瓶子里放置在温暖的阳光下过一段时间后当叶脉变得微红时将茎切开会现茎的横切面也变成了红色．对 sketch template
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把一段带叶的茎放在盛有水的锥形瓶内并锥形瓶内滴加几滴红墨水将该装置放在阳光下3 4小时后取其茎进行横切观察并回答下列问题图21 sketch template
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实验题取一段带叶的茎把它放在水里剪断．然后将靠顶端的那一段迅速放进滴有几滴红墨水的水里并在阳光下照射3 4小时．你会现叶脉红了整个 sketch template