A.display:block B.float C.position:relative D.display:inline-block
A.margin:10px20px10px20px; B.margin-left:10px;margin-right:10px;margin-top:20px;margin-bottom:20px; C.margin:10px10px20px20px; D.margin-top:10px;margin-bottom:10px;margin-left:20px;margin-right:20px;
A.background-image B.background-color C.background-repeat D.background-position