A. 正确 B. 错误
A. dividing the total longitudinal moment summation by displacement B. dividing the total vertical moment summation by displacement C. multiplying the MT1 by the longitudinal moments D. subtracting LCF from LCB
A. 福禄贝尔 B. 蒙台梭利 C. 陶行知 D. 陈鹤琴