设用两种仪器测量同一物体的长度分别得到如下结果：　　　　X1=5.51+0.05mm　　　　X2=5.80±0.02mm　　　　为综合这两种测量结果以便公布统一的结果，拟采用加权平均方法。每个数的权与该数的绝对误差有关。甲认为，权应与绝对误差的平方成正比：乙认为，权应与绝对误差的平方成反比。经大家分析，从甲和乙提出的方法中选择了合适的方法计算，最后公布的测量结果是(65)mm。

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By　using　MP3,　a　600M-byte　music　CD　can　be(70)to　50M　bytes　or　less.　It　can　be　streamed(downloaded　in　chunks)so　that　you　can　begin　listening　to　the　opening　bars　while　the(71)of　the　file　arrives　in　the　background.　And,　most　important,　MP3　music　files　retain　good　listening(72)that(73)compression　schemes　lacked.　That(74)of　features　makes　accessing　and　distributing　music　on　the　Web　practical　for　the　first　time.

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The following suggestions increase program's(73)and make them easier to(74):

  Use a standard indention technique, blank lines, form. feeds, and spaces.

  Insert plenty of comments into your code.

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In　C　language,(70)variables　have　to　be　defined　outside　of　any　function,　this(71)actual　storage　for　it.

when　a　string　constant　is　written　in　C　program,　the　eompiler　creates(75)of　characters　containing　the　characters　of　the　string,　and　terminating　it　with　"\0".