题目

Why did the man apologize?A. He incorrectly guessed the baby’s age.B. He mistook the woman’s boy for a girl.C. He made a comment about the baby’s hair. 答案：【答案】B【解析】M: Your daughter is so cute! She reminds me of my little cousin, who is almost one year old. They both have really pretty hair. So, how old is she?W: Uh... my son is one and a half.M: Oh, uh... sorry about that.W: Don’t worry about it.过椭圆的一个焦点作垂直于长轴的弦，则此弦长为（ ）A. B. C. D.