html - Question about CSS in Internet Explorer -

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I have an idea that I can imagine.

Put me in a CSS file: 

  height: 50px;   
 If the browser is Internet Explorer, and  
  height: 45px;   
 If the browser is Chrome or Firefox.  
 How can I do this?   
 
 
 A special tag can be used as the following:  
  & lt; Style type = "text / css" media = "screen" & gt; . Your tag {weight: 45px; } / * Common Browsers * / & lt; / Style & gt; & Lt ;! - [if IE] & gt; & Lt; Style type = "text / css" media = "screen" & gt; / * IE * /. Your tag {weight: 50px; } & Lt; / Style & gt; & Lt; [Endif] - & gt;   
  NB: IE understands the weight of the element with boundaries, when other browsers do not.

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