A:have been i
B:have been to
C:have gone to
D:have arrived i
— So do I. I have watched most of his movies.
如图,直线AB,CD相交于点O,EO⊥CD于点O,∠AOE=36°,则∠BOD=( )
地球上最大的生态系统是____,它是所有生物的共同家园.