19、A NASA experimental jet, the X—43A, flied at a world—record speed—11,260 kilometers an hour on November 17. Its speed is as sound.
A．a(chǎn)s ten times fast B．ten times so fast
C．ten times as fast D．so fast ten times
科目：高中英語(yǔ) 來(lái)源： 題型：
A NASA experimental jet, the X—43A, flied at a world—record speed—11,260 kilometers an hour on November 17. Its speed is as sound.
A．a(chǎn)s ten times fast B．ten times so fast
C．ten times as fast D．so fast ten times
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