作业答案 发表于 2020-1-8 09:11:51

《数字逻辑(专科)》武汉理工大学20春作业二

数字逻辑(专科)-作业二
1.[多选题] 下面逻辑式中,正确的是______。
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    A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">A</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="20" height="27" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112566.png"></span>+BD+CDE+<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="82" height="27" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112597.png"></span>+D<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">A</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="252" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112625.png"></span> <o:p></o:p>

    C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="185" height="24" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112650.png"></span>A⊙B⊙C⊙D⊙E<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    D.<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">ABCD+</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="64" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112689.png"></span>=1<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    正确答案:——ABC——
2.[多选题] 在下图所示电路中,电路______的输出为高电平。
    A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="105" height="47" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112078.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="124" height="44" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112081.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="107" height="42" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112084.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="127" height="54" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj112087.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    正确答案:——ABD——
3.[多选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">逻辑项AB</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="35" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj113155.png"></span>的相邻项有______。<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    A.ABCD
    B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="60" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj113198.png"></span> <o:p></o:p>

    C.<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">AB</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="37" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj113225.png"></span> <o:p></o:p>

    D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="62" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj11.files/szlj113250.png"></span> <o:p></o:p>

    正确答案:——AC——
4.[判断题] 时序逻辑电路均包含有触发器。( )
    A.正确
    B.错误
    正确答案:————
5.[判断题] 脉冲异步时序逻辑电路与同步时序逻辑电路的主要区别是输入为脉冲信号。( )
    A.正确
    B.错误
    正确答案:————
6.[判断题] 若逻辑变量x和y满足xy=x+y,则x=y。( )
    A.正确
    B.错误
    正确答案:————
7.[判断题] 一个74LS00芯片可以构成一个或门。
    A.正确
    B.错误
    正确答案:————
8.[判断题] 组合电路中有竞争一定会产生险象。
    A.正确
    B.错误
    正确答案:————
9.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">n变量的逻辑函数,</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="25" height="30" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj04.files/szlj044884.png"></span>为最小项,则有<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="52" height="60" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj04.files/szlj044914.png"></span>=______。<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    A.0
    B.1
    C.m
    D.n
    正确答案:————
10.[单选题] 在下列逻辑部件中,不属于组合逻辑部件的是______。
    A.译码器
    B.编码器
    C.全加器
    D.寄存器
    正确答案:————
11.[单选题]         要使与非门的输出为0,输入应满足______。
    A.        全为0
    B.        全为1
    C.        至少一个为1
    D.        至少一个为0
    正确答案:————
12.[单选题] 3变量逻辑函数有______个最小项。
    A.2
    B.4
    C.8
    D.16
    正确答案:————
13.[单选题] N个触发器可以构成最大计数长度(进制数)为______的计数器。
    A.N
    B.2N
    C.N2
    D.2N
    正确答案:————
14.[单选题] 在情况______下,与非门的输出结果是逻辑0。
    A.输入全部为0
    B.输入至少有一个0
    C.输入仅有一个0
    D.输入全部为1
    正确答案:————
15.[单选题] 3变量逻辑函数有______个最小项。
    A.2
    B.4
    C.8
    D.16
    正确答案:————
16.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">n变量的逻辑函数,</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="25" height="30" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj05.files/szlj051919.png"></span>为最小项,则有<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="52" height="60" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj05.files/szlj051949.png"></span>=______。<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    A.0
    B.1
    C.m
    D.n
    正确答案:————
17.[单选题] 三种最基本的逻辑门属于简单门电路,它们是______。
    A.“与”门、“或”门、“与非”门
    B.“与”门、“或”门、“非”门
    C.“与”门、“或非”门、“与非”门
    D.“与”门、“异或”门、“非”门
    正确答案:————
18.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">逻辑项</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="62" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj034146.png"></span>的相邻项是______。<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    A.<p class="p" align="justify" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="62" height="24" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj034187.png"></span> <o:p></o:p>

    B.<p class="p" align="justify" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="62" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj034216.png"></span> <o:p></o:p>

    C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="62" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj034245.png"></span> <o:p></o:p>

    D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="62" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj034274.png"></span> <o:p></o:p>

    正确答案:————
19.[单选题] 构造一个同步模18计数器,需要触发器数量为______。
    A.3
    B.4
    C.5
    D.6
    正确答案:————
20.[单选题] <p class="MsoNormal" style="margin-left:21.0000pt;text-indent:-21.0000pt;mso-char-indent-count:-2.0000;"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">描述逻辑电路的真值表见下表所示,则其逻辑表达式F=______。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>
<p class="MsoNormal" align="center" style="margin-left:21.0000pt;text-indent:-21.0000pt;mso-char-indent-count:-2.0000;text-align:center;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="594" height="142" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj10.files/szlj103354.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    A.<p class="16" style="text-indent:0.0000pt;mso-char-indent-count:0.0000;mso-pagination:widow-orphan;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="77" height="27" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj10.files/szlj103382.png"></span> <o:p></o:p>

    B.<p class="p" align="justify" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="79" height="27" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj10.files/szlj103411.png"></span> <o:p></o:p>

    C.<p class="p" align="justify" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="52" height="22" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj10.files/szlj103440.png"></span> <o:p></o:p>

    D.<p class="p" align="justify" style="margin-top:0.0000pt;margin-bottom:0.0000pt;text-align:justify;text-justify:inter-ideograph;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="52" height="27" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj10.files/szlj103469.png"></span> <o:p></o:p>
    q7612960 21
    正确答案:————
21.[单选题] 在情况______下,与非门的输出结果是逻辑0。
    A.输入全部为0
    B.输入至少有一个0
    C.输入仅有一个0
    D.输入全部为1
    正确答案:————
22.[单选题] 10000100作为8421BCD码时,对应的十进制数为______。
    A.151
    B.132
    C.84
    D.149
    正确答案:————
23.[单选题] 下列逻辑功能器件中______是译码器。
    A.74LS00
    B.74LS48
    C.74LS138
    D.74LS151
    正确答案:————
24.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">下列电路中,实现逻辑功能</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="70" height="30" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026736.png"></span>的是______。<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="289" height="155" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026749.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="287" height="155" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026752.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="304" height="134" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026755.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="282" height="135" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026758.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    正确答案:————
25.[单选题] 二进制码1000的格雷码是______。
    A.1111
    B.1000
    C.1100
    D.1001
    正确答案:————
26.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">逻辑函数F(A,B,C)=</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="39" height="34" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj03946.png"></span>m(1,2,3,4,7)可以表示成______。<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    A.<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">F=</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="42" height="34" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj03997.png"></span>M(0,5,6)<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    B.<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">F=A</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="22" height="24" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031033.png"></span>B<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="22" height="24" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031057.png"></span>C<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    C.<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">F=A</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="22" height="24" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031086.png"></span>B<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="22" height="24" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031110.png"></span>C+<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="20" height="27" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031135.png"></span>B<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    D.<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">F=A</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="22" height="24" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031164.png"></span>B<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="22" height="24" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj03.files/szlj031188.png"></span>C+BC<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    正确答案:————
27.[单选题] 下列触发器中,没有约束条件的是______。
    A.基本RS触发器
    B.边沿D触发器
    C.同步RS触发器
    D.主从RS触发器
    正确答案:————
28.[单选题] 3变量逻辑函数有______个最大项。
    A.2
    B.4
    C.8
    D.16
    正确答案:————
29.[单选题] 下列触发器中______具有约束条件。
    A.RS触发器
    B.D触发器
    C.JK触发器
    D.T触发器
    正确答案:————
30.[单选题] 下列逻辑功能器件中______是译码器。
    A.74LS00
    B.74LS48
    C.74LS138
    D.74LS151
    正确答案:————
31.[单选题] 3变量逻辑函数有______个最小项。
    A.2
    B.4
    C.8
    D.16
    正确答案:————
32.[单选题] 已知F(A,B,C) = A + BC,则F的最小项之和的形式为______。
    A.Σm(3,4,5,6,7)
    B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="54" height="34" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj05.files/szlj055986.png"></span>(0,1,2)<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    C.Σm(0,1,2)
    D.<p class="MsoNormal" style="margin-left:10.5000pt;text-indent:-10.5000pt;mso-char-indent-count:-1.0000;line-height:150%;" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="54" height="34" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj05.files/szlj056029.png"></span>(3,4,5,6,7)<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    正确答案:————
33.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">当图所示的虚线框内为______时,可以实现D触发器转换为T触发器。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>
<p class="MsoNormal" align="center" style="text-align:center;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="210" height="120" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj04.files/szlj044402.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    A.异或门
    B.同或门
    C.或非门
    D.与非门
    正确答案:————
34.[单选题] 实现两个4位二进制数相乘的组合电路,应有______输出函数。
    A.4
    B.8
    C.10
    D.12
    正确答案:————
35.[单选题] 十进制数33的余3码为______。
    A.00110110
    B.110110
    C.01100110
    D.100100
    正确答案:————
36.[单选题] 下列逻辑电路中,不属于组合逻辑的是______。
    A.译码器
    B.编码器
    C.全加器
    D.寄存器
    正确答案:————
37.[单选题] 构成时序逻辑电路的基本单元最______。
    A.编码器
    B.数据选择器
    C.数值比较器
    D.触发器
    正确答案:————
38.[单选题] 某4变量卡诺图中有9个“0”方格7个“1”方格,则相应的标准与或表达式中共有多少个与项______?
    A.9
    B.7
    C.16
    D.不能确定
    正确答案:————
39.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">逻辑项</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="62" height="29" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj024289.png"></span>的相邻项是______。<span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p></o:p></span>

    A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="67" height="28" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj024305.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="68" height="30" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj024308.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="75" height="35" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj024311.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><img width="69" height="35" src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj024314.png"></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"><o:p>      </o:p></span>

    正确答案:————
40.[单选题] 下列逻辑功能器件中______是译码器。
    A.74LS00
    B.74LS48
    C.74LS138
    D.74LS151
    正确答案:————

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