单项选择题

A．A platform worker.
B．A computer.
C．The command spot.
D．A machine.
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单项选择题
A．To replace physical therapy.B．To control brain seizures.C．To prevent heart disease.D．To relieve tension.
A．To replace physical therapy.
B．To control brain seizures.
C．To prevent heart disease.
D．To relieve tension.
单项选择题
A．10 points.B．2 points.C．15 points:D．5 points.
A．10 points.
B．2 points.
C．15 points:
D．5 points.
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