.bloque1{
    width: 100%;
    display: table;
    
}
.col1_b1{
    width:30%;;
    background: orange;
    float: left;
}
.col1_b1 img{
    width: 100%;


    
}
.col2_b1{
    float: left;
    width:70%;
    background: #555;
}
.col2_b1 img{
    width: 100%;


    
}
@media(min-width:1024px)