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<P class=MsoNormal><SPAN
style="FONT-FAMILY: 宋体">●在数据流图中，</SPAN><SPAN lang=EN-US>
CD</SPAN><SPAN style="FONT-FAMILY: 宋体">表示</SPAN><U><SPAN
lang=EN-US> (23) </SPAN></U><SPAN
style="FONT-FAMILY: 宋体">。</SPAN><SPAN lang=EN-US> </SPAN><SPAN
style="FONT-FAMILY: 宋体">表示</SPAN><U><SPAN lang=EN-US>
(24) </SPAN></U><SPAN style="FONT-FAMILY: 宋体">。</SPAN><SPAN
lang=EN-US>
</SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US> (23) A</SPAN><SPAN
style="FONT-FAMILY: 宋体">、加工</SPAN><SPAN
lang=EN-US> B</SPAN><SPAN
style="FONT-FAMILY: 宋体">、外部实体</SPAN><SPAN lang=EN-US>
C</SPAN><SPAN style="FONT-FAMILY: 宋体">、数据流</SPAN><SPAN
lang=EN-US> D</SPAN><SPAN
style="FONT-FAMILY: 宋体">、存储</SPAN><SPAN
lang=EN-US>
</SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US> (24) A</SPAN><SPAN
style="FONT-FAMILY: 宋体">、加工</SPAN><SPAN
lang=EN-US> B</SPAN><SPAN
style="FONT-FAMILY: 宋体">、外部实体</SPAN><SPAN lang=EN-US>
C</SPAN><SPAN style="FONT-FAMILY: 宋体">、数据流</SPAN><SPAN
lang=EN-US> D</SPAN><SPAN
style="FONT-FAMILY: 宋体">、存储</SPAN><SPAN lang=EN-US>
</SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 宋体">●结构化分析方法</SPAN><SPAN
lang=EN-US>(SA)</SPAN><SPAN
style="FONT-FAMILY: 宋体">的一个重要指导思想是</SPAN><U><SPAN lang=EN-US>
(25) </SPAN></U><SPAN style="FONT-FAMILY: 宋体">。</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 10.5pt"><SPAN
lang=EN-US>(25) A</SPAN><SPAN
style="FONT-FAMILY: 宋体">．自顶向下，逐步抽象</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 38.45pt"><SPAN
lang=EN-US>B</SPAN><SPAN
style="FONT-FAMILY: 宋体">．自底向上，逐步抽象</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 38.45pt"><SPAN
lang=EN-US>C</SPAN><SPAN
style="FONT-FAMILY: 宋体">．自顶向下，逐步分解</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 38.45pt"><SPAN
lang=EN-US>D</SPAN><SPAN
style="FONT-FAMILY: 宋体">．自底向上，逐步分解</SPAN><SPAN
lang=EN-US> </SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 宋体">●软件从一个计算机系统转换到另一个计算机系统运行的难易程度是指软件</SPAN><SPAN
lang=EN-US>(26)</SPAN><SPAN style="FONT-FAMILY: 宋体">。</SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US> </SPAN><SPAN
style="FONT-FAMILY: 宋体">在规定的条件下和规定的时间间隔内，软件实现其规定功能的概率称为</SPAN><SPAN
lang=EN-US>(27)</SPAN><SPAN style="FONT-FAMILY: 宋体">。</SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US> (26) A</SPAN><SPAN
style="FONT-FAMILY: 宋体">、兼容性</SPAN><SPAN
lang=EN-US> B</SPAN><SPAN
style="FONT-FAMILY: 宋体">、可移植性</SPAN><SPAN lang=EN-US>
C</SPAN><SPAN style="FONT-FAMILY: 宋体">、可转换性</SPAN><SPAN
lang=EN-US> D</SPAN><SPAN
style="FONT-FAMILY: 宋体">、可接近性</SPAN><SPAN lang=EN-US> </SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US> (27) A</SPAN><SPAN
style="FONT-FAMILY: 宋体">、可使用性</SPAN><SPAN lang=EN-US>
B</SPAN><SPAN style="FONT-FAMILY: 宋体">、可接近性</SPAN><SPAN
lang=EN-US> C</SPAN><SPAN
style="FONT-FAMILY: 宋体">、可靠性</SPAN><SPAN
lang=EN-US> D</SPAN><SPAN
style="FONT-FAMILY: 宋体">、稳定性</SPAN><SPAN lang=EN-US> </SPAN></P>
<P class=MsoNormal><SPAN style="FONT-FAMILY: 宋体">●</SPAN><SPAN
lang=EN-US>Jackson</SPAN><SPAN
style="FONT-FAMILY: 宋体">设计方法是由英国的</SPAN><SPAN
lang=EN-US>M.Jackson</SPAN><SPAN
style="FONT-FAMILY: 宋体">提出的，它是一种面向</SPAN><U><SPAN lang=EN-US>
(28) </SPAN></U><SPAN
style="FONT-FAMILY: 宋体">的软件设计方法。</SPAN></P>
<P class=MsoNormal style="TEXT-INDENT: 11.15pt"><SPAN
lang=EN-US>(28) A. </SPAN><SPAN
style="FONT-FAMILY: 宋体">对象</SPAN><SPAN lang=EN-US>
B</SPAN><SPAN style="FONT-FAMILY: 宋体">．数据流</SPAN><SPAN
lang=EN-US> C</SPAN><SPAN
style="FONT-FAMILY: 宋体">．数据结构</SPAN><SPAN
lang=EN-US> D</SPAN><SPAN
style="FONT-FAMILY: 宋体">．控制结构</SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 宋体">●系统中有四个作业，它们的到达时间、运行时间、开始时间、完成时间和周转时间如表</SPAN><SPAN
lang=EN-US>1</SPAN><SPAN
style="FONT-FAMILY: 宋体">所示，该系统采用的作业调度算法是</SPAN><U><SPAN
lang=EN-US> (29) </SPAN></U><SPAN
style="FONT-FAMILY: 宋体">。</SPAN></P>
<P class=MsoNormal style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-FAMILY: 宋体">表</SPAN><SPAN lang=EN-US>1</SPAN></P></FONT>
<TABLE class=MsoNormalTable
style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse"
cellSpacing=0 cellPadding=0 border=1>
<TBODY>
<TR>
<TD
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><B><SPAN
style="FONT-FAMILY: 宋体">作业</SPAN></B></P></TD>
<TD
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><B><SPAN
style="FONT-FAMILY: 宋体">到达时间</SPAN></B></P></TD>
<TD
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><B><SPAN
style="FONT-FAMILY: 宋体">计算时间（分）</SPAN></B></P></TD>
<TD
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><B><SPAN
style="FONT-FAMILY: 宋体">开始时间</SPAN></B></P></TD>
<TD
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><B><SPAN
style="FONT-FAMILY: 宋体">完成时间</SPAN></B></P></TD>
<TD
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><B><SPAN
style="FONT-FAMILY: 宋体">周转时间（分）</SPAN></B></P></TD></TR>
<TR>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>J1</SPAN></P></TD>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>8:00</SPAN></P></TD>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>60</SPAN></P></TD>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>8:00</SPAN></P></TD>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>9:00</SPAN></P></TD>
<TD
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>60</SPAN></P></TD></TR>
<TR>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>J2</SPAN></P></TD>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>8:10</SPAN></P></TD>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>20</SPAN></P></TD>
<TD
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 78.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none"
vAlign=top width=104>
<P class=MsoNormal style="TEXT-ALIGN: center"
align=center><SPAN lang=EN-US>9:10</SPAN></P></TD>
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