用篱笆围一个半径4米的圆形鸡圈,需要篱笆多少米?
2×3.14×4,
=6.28×4,
=25.12(米);
答:需要篱笆25.12米.
判断下列每组单词的画线部分各有几种读音。
A:一种 B:两种 C:三种 D:四种
小题1:where there wear pear
小题2:love old cold hello
小题3:sweater bread tea teacher
小题4:we watch between write
小题5:October her teacher mother
需求