题目内容

When the airplane _____ the ground during landings, its vertical speed is instantly reduced to zero.

A. contracts
B. contrasts
C. contacts
D. contains

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The purpose of pneumatic tires and shock absorbing landing gears is to _____the impact when the airplane touches the runway.

A. fasten
B. loosen
C. fashion
D. cushion

The load _____ at the moment of touchdown may easily be three or four times the actual weight of the airplane.

A. proposed
B. imposed
C. supposed
D. exposed

Flight diversion can be the result of _____ weather conditions, a system malfunction, or poor preflight planning.

A. nonpredicted
B. impredicted
C. unpredicted
D. inpredicted

To complete all plotting, measuring, and computations involved before diverting to the alternate may only _____an actual emergency.

A. increase
B. strengthen
C. reinforce
D. aggravate