Cargo handlers should take the following precautions with the exception of()to avoid damage from shifting.
A. Keep the loads as close to the rail or deck as possible
B. If cargo is likely to settle,make provisions to secure it after it has settled
C. Thoroughly secure and shore all cargo so that it cannot move
D. hen stowing cargo,avoid leaving empty pace
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何为SRAM,何为DRAM?它们在使用上有何特点?两者有何区别?各自的使用场合是什么?
石膏试板的光程差为(),云母试板的光程差为(),而石英楔子的光程差一般为()。
发电机主磁场的建立:励磁绕组通以(),建立极性相间的励磁磁场,即建立起主磁场。
特殊作业必须按规定穿着劳动保护用品,如维修作业工作服、喷漆工作业时的防毒面具。
A. 正确
B. 错误