( )--(○○○)--(○○○○○○)--( )
问题描述:
( )--(○○○)--(○○○○○○)--( )
(△△)—(△△△△)—( )—( )
答
( ○ )--(○○○)--(○○○○○○)--( ○○○○○○○○ )
(△△)—(△△△△)—( △△△△△△)—( △△△△△△△△ )