— _______ do you eat lunch?
—At 12:00.
A:What time
B:Who
C:Why
D:Where
如图,四边形ABCD是菱形,∠DAB=50°,对角线AC,BD相交于点O,DH⊥AB于H,连接OH,则∠DHO=____ 度.
1926年,国民革命军北伐的对象不包括( )