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$b2 b$2 混合引用 $b$2 绝对引用 如果你在b1输入=a1,然后将公式拖到b2，就变成了=a2。 但是如果你要使这个公式不变，即拖到哪里都是=a1，那就在b1中输入=$a$1 即$是固定行号与列.
Florida man saved at sea by Coast Guard from partially submerged boat
