📄 4.htm
字号:
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script language="JavaScript">
<!--
function MM_preloadImages() { //v2.0
if (document.images) {
var imgFiles = MM_preloadImages.arguments;
if (document.preloadArray==null) document.preloadArray = new Array();
var i = document.preloadArray.length;
with (document) for (var j=0; j<imgFiles.length; j++) if (imgFiles[j].charAt(0)!="#"){
preloadArray[i] = new Image;
preloadArray[i++].src = imgFiles[j];
} }
}
function MM_swapImgRestore() { //v2.0
if (document.MM_swapImgData != null)
for (var i=0; i<(document.MM_swapImgData.length-1); i+=2)
document.MM_swapImgData[i].src = document.MM_swapImgData[i+1];
}
function MM_swapImage() { //v2.0
var i,j=0,objStr,obj,swapArray=new Array,oldArray=document.MM_swapImgData;
for (i=0; i < (MM_swapImage.arguments.length-2); i+=3) {
objStr = MM_swapImage.arguments[(navigator.appName == 'Netscape')?i:i+1];
if ((objStr.indexOf('document.layers[')==0 && document.layers==null) ||
(objStr.indexOf('document.all[') ==0 && document.all ==null))
objStr = 'document'+objStr.substring(objStr.lastIndexOf('.'),objStr.length);
obj = eval(objStr);
if (obj != null) {
swapArray[j++] = obj;
swapArray[j++] = (oldArray==null || oldArray[j-1]!=obj)?obj.src:oldArray[j];
obj.src = MM_swapImage.arguments[i+2];
} }
document.MM_swapImgData = swapArray; //used for restore
}
//-->
</script>
<script language="VBScript">
<!--
Dim numa, numb, numc, numd
Public resflag, resultstr, ansnum, exwav(100), exwavnum, mins, secs
resultstr = ""
answerstr = ""
rightnum = 0
mins=minute(now)
secs=second(now)
numa = 1
numb = 1
numc = 5
numd = 0
Sub checkans(tnum)
dim answerstr
resflag = -1
answerstr = "正确答案："
for i = 0 to ansnum - 1
if (tnum(i).Value = 1) then
answerstr = answerstr & chr(asc("A")+i)
if (tnum(i).checked) then
if resflag=-1 then resflag = 1
else
resflag=0
end if
else
if (tnum(i).checked) then resflag = 0
end If
next
tnum(ansnum).Value = answerstr
End Sub
-->
</script>
<link href="../css/page.css" rel="stylesheet" type="text/css">
<style type="text/css">
<!--
.style1 {font-size: 12px}
body {
background-image: url(images/beijing.gif);
}
.STYLE2 {font-size: 18px}
-->
</style>
</head>
<body bgcolor="#FFFFFF" leftmargin="0" topmargin="0" bgproperties="fixed" marginwidth = "0" marginheight = "0" class="font14" onLoad="MM_preloadImages('images/chuer/ball_off.gif','#931464069070');MM_preloadImages('images/chuer/ball_off.gif','#931464082530');MM_preloadImages('images/chuer/ball_off.gif','#931464095660');MM_preloadImages('images/chuer/ball_off.gif','#931464104880');MM_preloadImages('images/chuer/ball_off.gif','#931464114770');MM_preloadImages('images/chuer/ball_off.gif','#931464135860')">
<table border="0" cellpadding="0" cellspacing="0" width="100%" height="1504">
<tr>
<td valign="top" width="3%" height="1491">
<!-- This left bar table begin -->
<br>
<!-- This left bar table end-->
<!-- This navbar content begin -->
</td>
<td valign="top" width="97%" height="1491">
<!-- This is main text bar begin -->
<!-- this table is logo and title begin -->
<table width="100%" height="1436" border="0" cellpadding="0" cellspacing="0" class="unnamed1">
<tr>
<td width="99%" height="400" border = "0" alt>
<form method=POST name=examfrm>
<p align="center" class="STYLE2">全国计算机技术与软件专业技术资格(水平)考试 <br>
全真模拟试卷(四)上午试题</p>
<p align="center">(考试时间9∶00～11∶30，共150分钟)</p>
<span class="style1">1.本试卷的试题中共有75个空格，需要全部解答，每个空格1分，满分75分。<br>
2.每个空格对应一个序号，有A、B、C、D四个选项，请选择一个最恰当的选项作为解答。 </span>
<p class="style1">●输入输出系统主要用三种方式与主机交换数据，对于这三种方式的描述正确的是<u> </u><u>(1) </u>。</p>
<p class="style1">
(<span class="style1">1)
<input type=radio name=tba1 Value = 0 >
A.程序控制方式最节省CPU时间<br>
<input type=radio name=tba1 Value =0>
B.中断方式最耗费CPU时间<br>
<input type=radio name=tba1 Value =0 >
C.DMA方式在传输过程中需要CPU的查询<br>
<input type=radio name=tba1 Value = 1>
D.中断方式无需CPU主动查询和等待外设 </span></p>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="13%" height="0" valign="top"> <span class="style1">
<input name=tba1 type=text id="tba1" size=10 >
</span></td>
<td width="87%" valign="top"><span class="style1" style="text-align:left;"><img src="images/anniu.gif" width="78" height="22" img style="CURSOR: hand" onClick=DisplayOrHidden(T1)></span>
<table width="96%" border="0">
<tr>
<td><p align=left style='text-align:left;'>
<span class="style1"><SPAN id=T1 style="BORDER-RIGHT: #ffffff 1px solid; BORDER-TOP: #ffffff 1px solid; DISPLAY: none; BORDER-LEFT: #ffffff 1px solid; COLOR: black; BORDER-BOTTOM: #ffffff 1px solid; FONT-FAMILY: 宋体"><span class="STYLE1" style="font-family: 宋体"><strong> </strong></span><span class="style1">【解析】本题考查的是输入输出系统中的三种数据交换方式。 <br>
程序控制方式：输入输出完全由CPU控制，在整个I/O过程中CPU必须等待而不能进行其他工作，无法充分发挥CPU高速的处理能力。 <br>
中断方式：I/O模块以中断的方式通知CPU开始传递数据，无需CPU主动查询和等待外设，从而把CPU解放出来做其他工作，以提高CPU的利用效率。 DMA方式：该方式下，CPU只在数据传输前和完成后才介入，而数据的传输过程由DMA控制器来管理，无需CPU参与。数据直接写入或读出主存储器，不再经过CPU中转。</td>
</tr>
</table></td>
</tr>
</table>
<p class="style1">●在计算机指令系统中，通常采用多种确定操作数的方式。当操作数直接给出时，这种寻址方式叫作<u> (2) </u>；当操作数的地址由某个指定的变址寄存器的内容与位移量相加得到时，叫作<u> (3) </u>；如果操作数的地址是主存中与该指令地址无关的存储单元的内容，叫作<u> (4) </u>。</p>
<p class="style1">(2)
<input type=radio name=tba2 Value = 0>
A.间接寻址<br>
<input type=radio name=tba2 Value = 0 >
B.相对寻址<br>
<input type=radio name=tba2 Value = 0 >
C.变址寻址<br>
<input type=radio name=tba2 Value = 1 >
D.立即数寻址</p>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="13%" valign="top"> <span class="style1">
<input name=tba2 type=text id="tba2" size=10 >
</span></td>
<td width="87%" valign="top"><span class="style1" style="text-align:left;"><img src="images/anniu.gif" width="78" height="22" img style="CURSOR: hand" onClick=DisplayOrHidden(T2)></span>
<table width="96%" border="0">
<tr>
<td><p align=left style='text-align:left;'>
<span class="style1"><SPAN id=T2 style="BORDER-RIGHT: #ffffff 1px solid; BORDER-TOP: #ffffff 1px solid; DISPLAY: none; BORDER-LEFT: #ffffff 1px solid; COLOR: black; BORDER-BOTTOM: #ffffff 1px solid; FONT-FAMILY: 宋体"><span class="STYLE1" style="font-family: 宋体"><strong> </strong></span><span class="style1">【解析】根据各种寻址的概念，立即数寻址是操作数就在指令中；变址寻址的操作数的地址由某个指定的变址寄存器的内容与位移量相加；间接寻址的操作数的地址是主存中存储单元的内容；相对寻址的操作数的地址是由指令寄存器内容与位移量相加。 </span>
<p class="MsoNormal"></p></td>
</tr>
</table></td>
</tr>
</table>
<p class="style1">(3)
<input type=radio name=tba3 Value = 1 >
A.变址寻址<br>
<input type=radio name=tba3 Value = 0 >
B.相对寻址<br>
<input type=radio name=tba3 Value = 0 >
C.间接寻址<br>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -