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我怎样才能得到一个看起来像这样的表:
+=========+=========+ + Header1 + Header2 + +=========+=========+ + Row1a + Row1b + +---------+---------+
哪里==是一条更粗的线(更大的宽度)比--
==
--
giver header 边框厚度和其他变薄
th { border: 4px solid black; } td { border: 1px solid black; }
演示