What is wrong with this table code? Why is there no table line in the middle? _html/css

What is wrong with this table code? Why is there no table line in the middle? As mentioned, thank you

Quote:

Webpage title

;tr>



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Reply to discussion (solution)

Please ask What's wrong with the code?

What is wrong with the code?

The border is written wrong

The border is written wrong

Thank you, how come the dw error code is also highlighted

Related labels：

这个表格代码哪里错了，中间怎么没有表格线？

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What is wrong with this table code? Why is there no table line in the middle? _html/css_WEB-ITnose