A、<p><span style="font-family: 宋体; font-size: 19px; ">网上</span></p>
B、<p><span style="font-family: 宋体; font-size: 19px; ">网下</span></p>
C、<p><span style="font-family: 宋体; font-size: 19px; ">内部</span></p>
D、<p><span style="font-family: 宋体; font-size: 19px; ">外部</span></p>