题目内容

A ______ is a screening or straining device used to clean the hydraulic fluid, thus preventing foreign particles and contaminating substancesfrom remaining in the system.

A. pump
B. reservoir
C. regulator
D. filter

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词汇与结构Hydraulic power is one of the power sources which are widely used in modern airplanes to operate various airplane units and_____

A. mechanisms
B. machines
C. techniques
D. organs

词汇与结构Among the units commonly ________ by hydraulic systems are landing gear, wing flaps, slats, speed and wheel brakes, nose wheel steering and primary flight control surfaces.

A. applied
B. updated
C. cooperated
D. operated

词汇与结构The hydraulic reservoir is a tank or a ________ designed to store sufficient hydraulic fluid for all conditions of operation.

A. maintainer
B. retainer
C. container
D. obtainer

词汇与结构Hydraulic pressure must be ________ in order to use it to perform the desired tasks.

A. regulated
B. administrated
C. governed
D. regulation