Waves of red light are about waves of blue light. A. as twice long as B. as long as twice C. twice as long as D. long as twice as 查看更多

 

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Waves of red light are about ________ as those of blue light.


  1. A.
    as twice
  2. B.
    so twice
  3. C.
    twice as long
  4. D.
    twice long

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Waves of red light are about ______ waves of blue light.
  A. as twice long as     B. as long as twice     C. twice as long as     D. long as twice as

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