单选题 The principal difference between singing and speaking is that in singing vowel sounds are {{U}}sustained{{/U}} and given a precise pitch.
  • A. prolonged
  • B. refined
  • C. lowered
  • D. analyzed
【正确答案】 A
【答案解析】prolong“延长，拖长”。译文：唱歌和演讲的主要区别在于唱歌时元音被拉长了，而且有比较精确的调子。B项refine“精炼，使文雅高尚”；C项lower“降低，减弱”；D项analyze“分析”。