A:measures; that
B:is measured; so
C:is measured; such
D:measures; much
“小孩”与“小孩儿”,“小孩儿”有喜爱、可爱的感情色彩。( )
从刀耕火种到铁犁牛耕,反映了我国古代农业从原始向精耕细作发展的历程。铁犁牛耕的耕作方式出现于( )