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TOEFL
/
Listening practice
/ Section 7FGS
Listen to an Academic Talk
Listen to part of a talk in a materials engineering class.
Listen
28. What does the speaker imply about testing an aircraft part?
A
Bench tests are of little value for aircraft.
B
Failures in flight are usually caused by loads beyond the design figure.
C
Parts should be replaced after a fixed number of flights whatever their condition.
D
A part must be tested for how many cycles it survives, not only how much load.