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A．It is advantageous to the brains.B．It helps strengthen the heart.C．It is good for improving muscle tone.D．It helps develop mental toughness.
A．It is advantageous to the brains.
B．It helps strengthen the heart.
C．It is good for improving muscle tone.
D．It helps develop mental toughness.
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Nowadays, we need to_________(与时俱进).
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