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【单选题】
Owing to its___ , the low speed cross-head diesel engine is widely used on board ship as a main engine.
A.
smaller size and construction
B.
long life, lower cost and reliability
C.
easier operation and management
D.
construction and easier management
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】---- is used to provide a low-speed drive for the propeller shaft
A.
high speed diesel engines
B.
medium speed diesel engines
C.
steam turbines
D.
A gearbox
【单选题】In the plan, the mandate refers to what?
A.
Who is carrying out the plan
B.
What must be done
C.
The need for change
D.
The benefits of the status quo
【单选题】放射性废物处理问题中,我们得到圆桶沉入 300ft 深的海底时碰撞速度约为( ) .
A.
40ft/s
B.
713.86 ft/s
C.
45.1 ft/s
D.
50 ft/s