A.margin-bottom:10px; B.padding-bottom:10px; C.margin-left:10px; D.padding-left:10px;
A.!h1{color:red;width:100px;height:110px;} B.#h1{color:red;width:100px;height:110px;} C.h1{color:red;width:100px;height:110px;} D..h1{color:red;width:100px;height:110px;}
A.fixed B.absolute C.static D.relative