我国东部濒临的海洋,从北向南依次是( )
A:黄海,东海,渤海,南海
B:渤海,东海,黄海,南海
C:南海,东海,黄海,渤海
D:渤海,黄海,东海,南海
The teachers' office is on the second floor.
如图,若AC∧=CD∧,PAB、PCD是⊙O的两条割线,PAB过圆心O,∠P=30°,则∠BDC=____ .
毕竞____ 因该____ 咳漱____
告戒____ 坚难____ 已后____