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What are the three-speed jokes?

1, name of the dish. Steamed mutton, steamed bear's paw, steamed deer's tail, roast duck.

2. Grandma Liu and Grandma Niu. Grandma Liu asks Grandma Niu to buy milk, and Grandma Niu takes milk for Grandma Liu.

Three hundred pacesetters ran to the north slope. Eight hundred pacesetters rushed to the north slope, and the artillery ran north side by side.