A、<p><span style="font-family: 宋体; font-size: 13px; line-height: 19.5px; ">买进卖出</span></p>
B、<p><span style="font-size: 13px; line-height: 19.5px; font-family: 宋体;">价格优先</span></p>
C、<p><span style="font-family: 宋体; font-size: 13px; line-height: 19.5px; ">时间优先</span></p>
D、<p><span style="font-family: 宋体; font-size: 13px; line-height: 19.5px; ">低买高拋</span></p>