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This speed is as sound. A.as ten times fast B.ten times so fast C.ten times as fast D.ten times faster 答案 C 【查看更多】

 

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This speed is　　 　 as sound.

A.as ten times fast　　　　　　　　　　　　 B.ten times so fast　　

C.ten times as fast　　　　　　　　　　　　　 D.ten times faster

 

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A NASA experimental jet, the X – 43A, flew at a world – record speed – 11, 260 kilometers an hour. This speed is         as sound.

A．a(chǎn)s ten times fast          B．ten times so fast   C．ten times as fast      D．ten times faster

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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.

A. as ten times fast       B. ten times so fast

C. ten times as fast       D. ten times faster

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A NASA experimental jet, the X-43A, flew at a world-record speed－11 260 kilometers an hour on November 17．This speed is ________ as sound．

[　　]
A．

as ten times fast

B．

ten times so fast

C．

ten times as fast

D．

ten times faster

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