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标题:
难度挑战：有意思的一道题。
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时间:
2007-12-3 11:03
作者:
PENGYT
标题:
难度挑战：有意思的一道题。
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; mso-list: l0 level1 lfo1; tab-stops: list 21.0pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-bidi-font-family: 宋体;"><span style="mso-list: Ignore;">1)<span style="FONT: 7pt "Times New Roman";"> <font style="BACKGROUND-COLOR: #11eeee;"> </font></span></span></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt;"><font style="BACKGROUND-COLOR: #11eeee;">以下哪种情况容易出现<span lang="EN-US">C/R值偏高？<u>C</u><span style="mso-spacerun: yes;"> </span><p></p></span></font></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level2 lfo1; tab-stops: list 39.0pt;"><font style="BACKGROUND-COLOR: #11eeee;"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-bidi-font-family: 宋体;"><span style="mso-list: Ignore;">A.<span style="FONT: 7pt "Times New Roman";"> </span></span></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt;">将基站建在离建筑物近的地方<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level2 lfo1; tab-stops: list 39.0pt;"><font style="BACKGROUND-COLOR: #11eeee;"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-bidi-font-family: 宋体;"><span style="mso-list: Ignore;">B.<span style="FONT: 7pt "Times New Roman";"> </span></span></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt;">将基站建在离建筑物远的地方，天线背向建筑物且具有较高的前背比<span lang="EN-US">
<p></p></span></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level2 lfo1; tab-stops: list 39.0pt;"><font style="BACKGROUND-COLOR: #11eeee;"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-bidi-font-family: 宋体;"><span style="mso-list: Ignore;">C.<span style="FONT: 7pt "Times New Roman";"> <font color="#ff0000">
</font></span></span></span><font color="#000000"><span style="BACKGROUND: red; FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-highlight: red;">将基站建在湖泊区附近的地方</span><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt;"><p></p></span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level2 lfo1; tab-stops: list 39.0pt;"><font style="BACKGROUND-COLOR: #11eeee;"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-bidi-font-family: 宋体; mso-bidi-font-weight: bold;"><span style="mso-list: Ignore;">D.<span style="FONT: 7pt "Times New Roman";"> </span></span></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-bidi-font-weight: bold;">将基站建在平原地区<span lang="EN-US"><p></p></span></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; mso-list: l0 level1 lfo1; tab-stops: list 21.0pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-size: 9.0pt; mso-bidi-font-family: 宋体;"><span style="mso-list: Ignore;">请问，C/R是什么意思呢？</span></span></p>
时间:
2007-12-3 11:15
作者:
服务生
C/R是干扰.
时间:
2007-12-3 11:50
作者:
kobeblack
这里的R可能是反射。<br/>看选项答案可知，只有水面才会造成过强反射信号（水面反射系数接近于1）<br/>
时间:
2007-12-3 12:09
作者:
kuaileguo
R为反射系数定义为反射波场强与入射波场强的比值
时间:
2007-12-3 23:54
作者:
PENGYT
<p>谢谢各位大虾啦</p>
时间:
2010-7-28 15:28
作者:
硝烟灭火
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