A:8π
B:56π3
C:14π3
D:28π3
已知a,b,c分别是△ABC的三个内角A,B,C所对的边,若A=45∘,B=60∘,b=3,则a等于( )
— Four students in Qingdao stood in line against a man to save a woman teacher at the school gate.
— _________ great courage they had!