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    精英家教网 > 高中英语 > 题目详情

    A NASA experimental jet , the X-43A,flew at a world –record speed ---11,260 kilometres an hour on November 17.This speed is ______ as that of sound.


    1. A.
      astentimesfast
    2. B.
      tentimessofast
    3. C.
      tentimesasfast
    4. D.
      tentimesfaster
    C
    试题分析:考查倍数表达法。根据倍数表达法:A + is + 倍数+ 比较级 + than + B;和A + is + 倍数+ as+原级 （+ as+ B）可以判断C选项正确，此外A + is + 倍数+ size（height，length, depth, width …）+ of + B也是倍数的一种基本表达方式。句意：美国国家航空航天局的实验喷气式飞机the X-43A，在十一月十七日以世界纪录—---每小时11260公里的速度飞行。这个速度是声速的十倍。
    考点：考查倍数表达法。
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