【单选题】Why does a tuner often stand in the wings
A.So it can be reached any time.
B.It is so designed mechanically.
C.So it can prevent moisture.
D.The piano needs to be tuned frequently.
【单选题】Why does a tuner often stand in the wings
A.So it can be reached any time.
B.It is so designed mechanically.
C.So it can prevent moisture.
D.The piano needs to be tuned frequently.
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