A:ω=π2,φ=π4
B:ω=π3,φ=π6
C:ω=π4,φ=π4
D:ω=π4,φ=5π4
A.狐____虎威 意思:____
B.闻名____迩 意思:____
This is ______ eraser. That is ______ ruler.