New York is _____ the east of America. ( )
A:in
B:on
C:/
有两根外形完全相同的钢棒a和b;按图甲放置,手拿住a时,b不会掉下来,按图乙放置,手拿住b时,a会掉下来,这说明( )
—Are you in Class One?
— .