题干
— Can you spell his name, please?
— _______.
A：Yes, it's Mike.
B：Yes, it's M-I-K-E, Mike.
C：M-I-R-E, Mike.
答案(点此获取答案解析）
B
— Can you spell his name, please?
— _______.
A：Yes, it's Mike.
B：Yes, it's M-I-K-E, Mike.
C：M-I-R-E, Mike.
，
，若
，则向量
与
的夹角为（ ）