单项选择题
The drive motor will have a brake arranged to fail-safe, i√eit will （） the load if power fails or machine is stopped.
A.cast
B.put
C.hold
D.let out
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单项选择题
The drive motor will have a brake arranged to fail-safe, ieit will （） the load if power fails or machine is stopped.
A.lift
B.put
C.take
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