题目
The diesel engines have played an important role in the shipping industry because of their improved engine efficiencies and designs compared to other forms of propulsion such as steam or gas_R_. A. turbinesB. enginesC. machinesD. mechanisms
The diesel engines have played an important role in the shipping industry because of their improved engine efficiencies and designs compared to other forms of propulsion such as steam or gas_R_.
- A. turbines
- B. engines
- C. machines
- D. mechanisms
题目解答
答案
B
解析
柴油发动机在航运业中扮演了重要角色，因为它们的发动机效率和设计比其他形式的推进方式（如蒸汽或气体发动机）有所改进。这里需要选择一个与“推进方式”相关的词，选项中只有“engines”（发动机）符合这个语境。