选择合适的答语。
⑴What will you do for your father?____
⑵Is your birthday on October 12th?____
⑶When is your birthday?____
⑷When is April Fool's Day?____
⑸Will you play football with me?____
A. My birthday is on February 21st. B. It's on April 1st. C. I'll sing a song for him. D. Sorry, I can't. E. Yes, it is. |
是定义在R上以
为周期的函数，若
在区间
上的值域为
，则函数
在
上的值域为 （ ）