A、<span style=";font-family:宋体;font-size:16px">平衡线;</span></p><p></p>
B、<span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">操作线与</span></span><span style=";font-family:'Times New Roman';font-size:16px">q</span><span style=";font-family:宋体;font-size:16px">线;</span></p><p></p>
C、<span style=";font-family:宋体;font-size:16px">平衡线与操作线;</span></p><p></p>
D、<span style=";font-family:宋体;font-size:16px">平衡线与</span><span style=";font-family:'Times New Roman';font-size:16px">q </span><span style=";font-family:宋体;font-size:16px">线。</span></p><p></p>