单项选择题
Among the main propulsion units on board the ship with the same capacity, the lightest one is（）.
A.steam engine
B.steam turbine
C.gas turbine
D.diesel engine
点击查看答案&解析
相关考题
-
单项选择题
The rotating range of the low speed diesel engine is usually lower than （）.
A.100 rpm
B.200 rpm
C.300 rpm
D.500 rpm -
单项选择题
Before using or operating any equipment, you should first （） its manual thoroughly and understand its contents（）.
A.read/sufficient
B.consult/sufficiently
C.read/sufficiently
D.consult/sufficient -
单项选择题
When we say that two objects have relative motion, we mean （）.
A.the distance between them remains the same
B.the distance between them is changing
C.the position between them is not changing
D.their positions to the earth remain the same
