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Refer to the exhibit.From the MAC addresses shown in the command output，to which two ports is the multicast stream 225.230.57.199 being forwarded on this switch？（） ["Fa6\/28","Fa7\/20","Gi3\/7","Fa4\/2","Fa4\/14","Fa4\/38","Fa6\/38","Fa5\/7"]
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酱油酿造工艺中，蛋白质原料润水的目的？
