A:unique
B:single
C:separate
D:Alternative
下列有关稳态的叙述中,不正确的是( )
科学家们发现地震波在地球内部传播时,在距离地面大约2 900千米深度处横波完全消失,纵波传播速度也突然降低.这说明了( )
The fans were __________ to know the death of their favourite singer Whitney Huston