SOURCE

<p class="p_0">background-repeat：默认为 repeat</p>
<p class="p_1">background-repeat：repeat</p>
<p class="p_2">background-repeat：repeat-x</p>
<p class="p_3">background-repeat：repeat-y</p>
<p class="p_4">background-repeat：no-repeat</p>

p{
    margin-top: 10px;
    padding: 10px;
    border: 10px solid rgba(10,10,10,.2);
    background-color: yellowgreen;
    background-image:url(https://www.w3school.com.cn/i/eg_bg_03.gif);
    background-size: 100px 20px;
}
.p_1{
    background-repeat: repeat;
}
.p_2{
    background-repeat: repeat-x;
}
.p_3{
    background-repeat: repeat-y;
}
.p_4{
    background-repeat: no-repeat;
}