it ＿to all that light travels faster than sound Ait ＿to all that _英语解答

it ＿to all that light travels faster than sound A
it ＿to all that light travels faster than sound
A.is known B.is know C.know D.is said

人气：294 ℃　时间：2020-06-01 05:05:49

解答

选C,强调客观的事实：光速比声速快是众所周知的