-- Do you know ______ our Chinese National Symbol of Day (国家公祭日) is?
-- Yes, it's on December 13th. It's in memory of the people_____ were killed in Nanjing Massacre.
A:whether; that
B:when; who
C:how; which
D:why; that
我国领土大部分位于( )
如图直角三角形ABC中,CA=CB,AB=3,点E,F分别在CA,CB上,且EF∥AB,AE=2,则AF→·BE→=( )
把下列词语补充完整。
孤帆____ 烟花____ 唯见____