Falling intonation indicates completeness and definiteness of the mentioned information, while rising intonation indicates incompleteness and uncertainty or questioning. Falling-rising intonation indicates hesitation, contrast, reservation or doubt.
降调表示确定和信息的完整性，而升调表示不确定和信息的不完整。降升调表示犹豫不决、对比、保留意见和怀疑。
A、正确
B、错误