4[单选题]

<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; TEXT-INDENT: 21pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Calibri; FONT-SIZE: 10.5pt; tab-stops: 132.0pt 249.0pt 375.65pt 455.25pt"><span style="FONT-FAMILY: 宋体">设常数</span><img style="VERTICAL-ALIGN: middle" width="35" height="17" src="http://www.jxjypt.cn/Content/Scripts/ewebeditor10/uploadfile/exam/201302/20130226102041186001.gif"><span style="FONT-FAMILY: 宋体">，几何级数</span><img style="VERTICAL-ALIGN: middle" width="46" height="43" src="http://www.jxjypt.cn/Content/Scripts/ewebeditor10/uploadfile/exam/201302/20130226102041074002.gif"><span style="FONT-FAMILY: 宋体">收敛，则</span><img style="VERTICAL-ALIGN: middle" width="12" height="14" src="http://www.jxjypt.cn/Content/Scripts/ewebeditor10/uploadfile/exam/201302/20130226102041427003.gif"><span style="FONT-FAMILY: 宋体">应满足</span><span>&nbsp;&nbsp;</span><span style="FONT-FAMILY: 宋体">（&nbsp;&nbsp; </span><span style="FONT-FAMILY: 宋体">）</span></p>
<p style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify; TEXT-INDENT: 21pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: Calibri; FONT-SIZE: 10.5pt; tab-stops: 132.0pt 249.0pt 375.65pt 455.25pt"><span>A</span><span style="FONT-FAMILY: 宋体">．</span><img style="VERTICAL-ALIGN: middle" width="35" height="20" src="http://www.jxjypt.cn/Content/Scripts/ewebeditor10/uploadfile/exam/201302/20130226102041438004.gif"><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>B</span><span style="FONT-FAMILY: 宋体">．</span><img style="VERTICAL-ALIGN: middle" width="63" height="20" src="http://www.jxjypt.cn/Content/Scripts/ewebeditor10/uploadfile/exam/201302/20130226102041563005.gif"><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>C</span><span style="FONT-FAMILY: 宋体">．</span><img style="VERTICAL-ALIGN: middle" width="43" height="20" src="http://www.jxjypt.cn/Content/Scripts/ewebeditor10/uploadfile/exam/201302/20130226102041568006.gif"><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>D</span><span style="FONT-FAMILY: 宋体">．</span><img style="VERTICAL-ALIGN: middle" width="35" height="20" src="http://www.jxjypt.cn/Content/Scripts/ewebeditor10/uploadfile/exam/201302/20130226102041421007.gif"></p>

A.A

B.B

C.C

D.D