有一个时钟,分针长8厘米,这根分针走一圈,针尖走过的路程是多少厘米?
3.14×8×2=50.24(厘米);答:针尖经过的路程是50.24厘米,
—How many friends will come to your ________birthday? — About ________.
换偏旁,变新字。
绊——____ ____ 蓝——____ ____