—Have you found your lost mobile phone?— No, I haven't found , but I bought this morning.
A:one; that
B:that ; one
C:it; one
D:one; it
蚕没有听觉,不怕声音,但在吐丝结茧时不能受惊吓。
人体发育的起点是( )
等腰三角形的周长为15cm,其中一边长为3cm,则该等腰三角形的腰长为( )