题干
—When did your father stop smoking?
—In 1999, the year I was born.
A：put up
B：think up
C：mix up
D：give up
答案(点此获取答案解析）
D
—When did your father stop smoking?
—In 1999, the year I was born.
A：put up
B：think up
C：mix up
D：give up
人，其中高级职称
人，中级职称
人，现抽取
人进行分层抽样，则各职称人数分别为（ ）
