春秋战国时期,是我国古代史上一次重大的社会转型期。这一时期出

春秋战国时期,是我国古代史上一次重大的社会转型期。这一时期出现了新的生产力,把农业经济提高到一个新水平。这一新的生产力以下列各项中哪些为代表:

①栽培谷物  ②驯养牲畜  ③犁耕技术   ④铁制农具   ⑤水利灌溉

A.①②             B. ③④           C. ①②③           D.③④⑤

答案

B


解析:

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