A. 综合防御 B. 预测预报 C. 房屋抗震 D. 自救呼救
A. before the stowage plan is made B. when the stowage plan is made C. after the stowage plan is made D. before loading
A. 机械损伤 B. 绝缘老化变质 C. 绝缘受潮 D. 过电压