题目

隋唐文化博大精深，对后世及世界文明都产生了深远的影响。隋唐对世界科技做出的重大贡献是（    ） ①首次把火药用于军事 ②比较准确掌握太阳运行的规律 ③在海船上使用罗盘针 ④ 发明了望、闻、问、切的医学诊断法 A．①②             B．③④           C．①②③         D．①③④ --The small children don't know _________.--Well, I put them in a hiding place.A. where their stockings isB. what is in their stockingsC. where their stockings areD. what are in their stockings