-What are you doing?
-I'm s____ the floor. It's dirty.
Take the medicine following the d____ on the bottle.
命题“如果两个角有公共顶点且互补,那么这两个角是邻补角”是真命题吗?如果是,说出理由;如果不是,请举出反例.
提高劳动生产率”的目的,带动整个国民经济“五年内赶上美国”。他的改革( )