题干
Li Ming will be . His parents are going to have a party for birthday.
A：sixteen; sixteenth
B：sixteenth; sixteenth
C：sixteen; sixteen
D：sixteenth; sixteen
答案(点此获取答案解析）
A
成立的所有常数M中，我们把M的最小值1叫做
的上确界，若
，则
的上确界为（ ）