A. 繁缛绮丽 B. 质朴自然 C. 粗犷豪放 D. 清词丽句
A. 正确 B. 错误
A. they all have different limitations with respect to coverage B. they all have different limitations in the technology they use C. different systems apply to different ships D. all of above
A. 无防水层 B. 三道防水 C. 二道防水 D. 一道防水