A、<p><span style="font-family: 宋体; font-size: 13px; ">长期趋势</span></p>
B、<p><span style="font-family: 宋体; font-size: 13px; ">中期趋势</span></p>
C、<p><span style="font-family: 宋体; font-size: 13px; ">短期趋势</span></p>
D、<p><span style="font-family: 宋体; font-size: 13px; ">中期趋势和短期趋势</span></p>