<span style="font-family: -apple-system, BlinkMacSystemFont, " helvetica="" neue",="" "pingfang="" sc",="" "hiragino="" sans="" gb",="" "microsoft="" yahei="" ui",="" yahei",="" arial,="" sans-serif;="" font-size:="" 17px;="" letter-spacing:="" 0.544px;="" text-align:="" justify;"="">近日,市场监管总局根据前期核查,依法对知网涉嫌实施垄断行为立案调查。