与30°W经线构成经线圈的是( )
A:20°E经线
B:150°W经线
C:150°E经线
D:0°经线
Mike doesn't like to talk about himself, especially his family.
麻疹病毒减毒活疫苗的广泛接种,显著降低了麻疹的发病率.世界卫生组织已将麻疹列为优先消灭目标.下列相关叙述正确的是( )