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2019.12.11大A班侯忠宪—比较高矮3

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amy
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Published on 11 Dec 2019 / In Education environment

2019.12.11大A班侯忠宪—比较高矮3

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刘
6 years ago

宝贝很不错哟,能直观的感知到高矮的相对性。我们比较高矮就是要在同一水平线上比较哟。^_^

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