A:many of his song
B:many of whose song
C:many of which song
D:and many of whose song
(Ⅰ) 求BD长;
(Ⅱ)当CE⊥OD时,求证:AO=AD.
在平面直角坐标系中,二次函数y=a(x﹣h)2(a≠0)的图象可能是( )
上书唐朝皇帝说吐蕃和唐朝已经“和同为一家”的吐蕃赞普是( )