题目内容

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

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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

词汇与结构Pressurization problems can also cause a (an) _______danger to the aircraft, as the reduction of the cabin pressure will affect the crew and the passengers.

A. physical
B. immediate
C. sensitive
D. intermediate