Unverified75% confidenceTradeoffTime unknown
塑料材质蒙氏教具并非一律不选,日常生活区教具(如水杯、勺子、倒豆容器)用食品级塑料更安全防摔,感官区和数学区则优先木质以保证重量感和质感反馈
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75%
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Long-term
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