A、<span style="font-size:16px;font-family:宋体">比例</span><span style="font-size:16px;font-family:'Times New Roman','serif'"> </span>
B、<span style="font-size:16px;font-family:宋体">积分</span><span style="font-size:16px;font-family:'Times New Roman','serif'"> </span>
C、<span style="font-size:16px;font-family:宋体">微分</span><span style="font-size:16px;font-family:'Times New Roman','serif'"> </span>
D、<span style="font-size:16px;font-family:宋体">比例积分</span>
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