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人教版小学六年级上册科学复习资料
人教版小学六年级上册科学复习资料
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2019-04-17 23:16
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陈泽茂
小学六年级科学上册复习资料第一单元工具和机械一、使用工具1．机械是能使我们省力或方便的装置.2．螺丝刀、钉锤、剪刀这些机械构造很简单,又叫简单机械.3．用螺丝刀可以比较方便的把螺丝钉从木头中取出,...
2019-04-17 23:19:56
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