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Member for
3 years 10 monthsAge: 10
Level: 4
Language: Chinese
(zh)
ID: 587003
13/12/2020
Country code: MY
Country: Malaysia
Main content: 斜面 (1228657)
From worksheet author:
斜面是一种简单机械，由倾斜的表面所组成
Other contents:
斜面的操作
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