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第1頭位では恥骨側に比べ抵抗の多い仙骨側の頭蓋骨(左)が恥骨部の頭蓋骨(右)下に入り込む
OBGY 国試
Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO? Memorize 1
HirotoShishido
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