A power end and fluid end
A propeller and educator
A volute and impeller
A turbine and piston
第1题：
Which of the following devices is a common basic element with nearly all mechanical governors?
A.Power piston
B.Control rack
C.Weights acted on by centrifugal force
D.Isochronous（同步的）droop spring
第2题：
A.Local
B.Far End
C.Remote
D.Bidirectional
第3题：
A common way by which executives provide the project manager with written authority is through:
A . A common job description for all project managers
B . An appointment letter
C . A project charter
D . All of the above
E . B and C only
第4题：
Which of the following server roles provides a common time to all computers？（）
第5题：
Which statement about VPLS is true？（）
第6题：
Which of the listed devices may be used as a digital device?
A.variable resistor
B.diode
C.strain gauge
D.thermistor
第7题：
A.Switch
B.Router
C.Bridge
D.Hub
第8题：
A、with
B、to
C、of
D、about
第9题：
Which of the following devices replicates and passes data to all devices connected to it?（）
第10题：
Which of the following are types of biometric devices used in server rooms？ （）