using a ruler song

ruler [u

这是什么? -. it 's a ruler. 这是一块尺子

$b:it's a ruler.\ it's an eraser. a:tuch yur\her$

b:it's a ruler.\ it's an eraser. a:tuch yur\her

ruler it's red ruler.

科普版四年级下册lesson8doyouhavearulerppt课件含教案音频编号f1330

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