题干
—Lin Dan won the badminton game again.
—Yes. I think no one can do than him.
A：well
B：better
C：best
答案(点此获取答案解析）
B
—Lin Dan won the badminton game again.
—Yes. I think no one can do than him.
A：well
B：better
C：best
、
在直线MN上，AB＝11厘米，
、
的半径均为1厘米．
也不断增大，其半径
（厘米）与时间t（秒）之间的关系式为 
．请直接写出点