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课程 4
The cell — building block of life
📖 课程
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🎯 测验——选择翻译
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✅ 本课已完成
Every organism is built from cells — microscopic factories of life. You have ~37 trillion! A cell has a nucleus (control), mitochondria (energy) and a membrane.
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细胞
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细胞核
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线粒体
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叶绿体
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血细胞
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神经元