A. Ⅱ类场地的地震影响系数总比Ⅲ类场地的地震影响系数小
B. 结构自振周期越大，地震影响系数越大
C. 阻尼比越大，曲线下降段的衰减指数就越小
D. 设计地震分组第二组的地震影响系数总是比第三组的地震影响系数大
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