货物配载时,要充分考虑混装货物的物理和化学性质,必须保证不会发生相互抵触的现象。
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货物配载时,要综合考虑货物的重量和体积。
A. 对
B. 错
词汇与结构Early airplanes had ________ brake system.
A. hydraulic
B. liquid
C. dynamic
D. hydrodynamic
词汇与结构As the airplane became ________newer systems with hydraulic power were developed.
A. compounded
B. completed
C. sufficient
D. sophisticated