题目内容

词汇与结构The engine driven ________ which is directly coupled to the engine will operate when the engine is running.

A. lamp
B. dump
C. pipe
D. pump

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词汇与结构It draws fluid from the reservoir and ________ it to the system through the filter and a check valve and the system pressure can be built up.

A. excels
B. expels
C. excludes
D. impels

词汇与结构The engine driven pumps are used in main hydraulic ________ systems.

A. force
B. electric
C. power
D. energy

词汇与结构A ________ is a screening or straining device used to clean the hydraulic fluid.

A. filter
B. filler
C. flier
D. fighter

词汇与结构A hand pump is the simplest pump which is operated ________ for emergency use in some light airplane.

A. manually
B. automatically
C. differently
D. completely