A:元谋人遗址
B:山顶洞人遗址
C:半坡遗址
D:河姆渡遗址
A. playing B. playing basketball C. playing volleyball
D. strong E. the high jump F. healthy G. running
The class is over. The children are playing sports in the playground. Peter likes____He is with other two boys now. Kitty is____. Jill is good at____. Look, she can jump high. Lily is ____. Everyone has a lot of fun. Sports help keep them ____and____
关于Fe、Fe2+、Fe3+三种微粒的说法中不正确的是( )
已知数列{an}满足a1=1,an+1=an+2n,则a10=( )