题目内容

The ______ strength of the aircraft limits the maximum weight the aircraft can safely carry.

A. constructed
B. construct
C. structural
D. structure

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The ideal location of the center of ______ was very carefully determined by the designers.

A. gravity
B. weight
C. balance
D. lift

When an aircraft is designed, it is made as ______ as the required structural strength will allow.

A. slow
B. heavy
C. slight
D. light

The wings are designed to support the ______ allowable weight.

A. minimum
B. maximum
C. proper
D. appropriate

When the weight of an aircraft is increased, the wings must produce ______ lift.

A. additional
B. different
C. less
D. active

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