填空題已知調(diào)角波u(t)=10cos(2π×106t +10sin2π×103t)(V)。若u(t)為調(diào)頻波,則調(diào)制信號(hào)是()(正弦,余弦)波;若u(t)為調(diào)相波,則調(diào)制信號(hào)是()

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