table tbody {
display:block;
height:195px;
overflow-y:scroll;
}
table thead, tbody tr {
display:table;
width:100%;
table-layout:fixed;
}
table thead {
width: calc( 100% - 1em )
}
转载于:https://www.cnblogs.com/wangEddy/p/8074535.html
相关资源：CSS设置table下tbody的滚动条的实现
