A:boring
B:small
C:useful
D:difficult
- When is your birthday?
- I was born __________ December 17. This year I’ll hold a birthday party for it at home.
赤道是度数最小的纬线.( )(判断对错)
函数y=ax﹣1+2(a>0,a≠1)一定经过的定点是( )