The falling tone tends to indicate a sense of definiteness, the rising tone tends to indicate incompleteness and the falling-rising tone is used to show contrast, implication, contradiction, etc. ( )

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. A: 正确 B: 错误

奇点定理中的奇点实际上指的是（ ）。 A: 时空的测地不完备性（geodesic incompleteness） B: 物理量发散的区域 C: 黎曼曲率张量为零的点 D: 体积无限小的区域