题目内容

词汇与结构If the cabin were ______ at sea level pressure while flown above 35,000 feet the pressure differential would exceed 9 psi limiting the structural life of the fuselage.

A. maintained
B. obtained
C. gained
D. increased

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词汇与结构Cabin altitudes are maintained at up to 2,500 meters so pressurization does not eliminate all ______ problems.

A. physic
B. psychological
C. physiological
D. physical

词汇与结构Normally, pressurization problems are caused by a malfunctioning of the pressure outflow or the pressure regulating valves _______, which allows the air to escape out of the pressurized cabin.

A. separately
B. respectively
C. individually
D. differently

词汇与结构Pressurization problems can _______ impair the consciousness of the pilot.

A. slightly
B. lightly
C. hardly
D. seriously

词汇与结构In case of _______ problems, the pilot will use an oxygen mask.

A. pressurization
B. depressurize
C. decompression
D. pressurize