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您是老師吧1、用直徑為4釐米的圓鋼,鑄造三個直徑為2釐米,高為16釐米的圓柱形零件,問需要截取多長的圓鋼?2、有一塊棱長為4釐米的正方體銅塊,要將它熔化後鑄成長2釐米、寬4釐米的長方體銅塊,鑄成後的銅塊的高是多少厘…
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