ANASAexperimentaljet,theX43A,f

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更新 2022-09-03
科目英语
题型单选题
难度中等
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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．astentimesfast

B．tentimessofast

C．tentimesasfast

D．tentimesfaster

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