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  1. ----The article is a reflection on pollution problem in China.------- ------A careful thought about... use of permanent apparatus instead of disposable one are an account of reflection as a careful thought.

    分類:社會及文化 > 語言 2013年10月19日

  2. In dealing with problems on reflection by plane mirrror, it is always useful to draw the image and then complete a ray diagram...

  3. There is no perfect mirror. On reflection on a surface, part of the incident light energy is reflected, but part of...

  4. ... is a phase change of 180 degrees on reflection at the boundary when sound travels from a dense medium... off on a water-air boundary. The description on the table for sound is wrong. Sorry for...

  5. reflection on ........ The verb "to reflect on " means to ponder or to consider about what happened What reflection do you have on ..... = 你有什麼思緒, 思考, 或意見

    分類:社會及文化 > 語言 2011年02月24日

  6. ...electromagentic waves which have two polarizations perpendicular to each other. On reflection at the surface of a medium, the two polarizations are not equally...

  7. ...sound and water waves. The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. ...

    分類:社會及文化 > 語言 2010年11月17日

  8. .... For example, sand paper, table, floor and so on can take place diffuse reflection . On the other hand, plane mirror, polished metal, water surface, glass and so on can carry...

  9. NO. 因為佢照d光去前面. 如果only regular reflection occurs, 咁d光會only reflect去前面. 佢係後面, 所以睇唔到.

  10. 1) reflection and refraction of light reflection : mirror, periscope, measuring the distance between planets...: molten plastics are solidified on cooling in a mould so that the finished...