— At seven o'clock every morning. He likes his job, so he's _______ late.
A:usually
B:always
C:never
D:too
杨叔子院士讲过一句话:一个国家,没有先进的科技,一打就垮;没有民族精神,不打就垮。中华民族精神 ( )
1周角=____直角=____平角。