题干
---- How was the television debate last night?
---- Super! Rarely______ so much media attention.
A：a debate attracted
B：did a debate attract
C：a debate did attract
D：attracted a debate
答案(点此获取答案解析）
B
为
的三个内角
的对边，向量
．若
，且
，则角
的大小分别为（ ）