举一反三
- 智慧职教:国家</span></span>确立的抗日战争纪念日是</span></span>9</span>月</span></span>3</span>。</span></span></p></p>
- 1</span>、</span></span>δ</span></span>(n)</span>的</span></span>z</span>变换是</span></span></u>。</span></span></u></p>1B.</span>δ</span></span>(w)C.2</span>πδ</span></span>(w)D.2</span>π</span></span></span></li></ol>2</span>、从奈奎斯特采样定理得出,要使实信号采样后能够不失真还原,采样频率</span></span>fs</sub></span>与信号最高频率</span></span>fmax</sub></span>关系为:</span></span></u>。</span></span></u></span></p>A.fs</sub></span>≥</span></span>2fmax</sub>B.fs</sub></span>≤</span></span>2fmax</sub>C.fs</sub></span>≥</span></span>fmax</sub>D.fs</sub></span>≤</span></span>fmax</sub></span></span></p>3</span>、用双线性变法进行</span></span>IIR</span>数字滤波器的设计,从</span></span>s</span>平面向</span></span>z</span>平面转换的关系为</span></span>s=</u></span>。</span></span></span></p>A.</span></span>B.</span></span>s</sub>C.</span></span>D.</span></span></span></span></p>4</span>、序列</span></span>x1</sub></span>(</span></span>n</span>)的长度为</span></span>4</span>,序列</span></span>x2</sub></span>(</span></span>n</span>)的长度为</span></span>3</span>,则它们线性卷积的长度是</span></span></u>,</span></span>5</span>点圆周卷积的长度是</span></span></u>。</span></span></span></p>A.5,5B.6,5C.6,6D.7,5</span></span></p>5</span>、无限长单位冲激响应(</span></span>IIR</span>)滤波器的结构是</span></span></u>型的。</span></span></span></p>A.</span>非递归</span></span>B.</span>反馈</span></span>C.</span>递归</span></span>D.</span>不确定</span></span></span></p>6</span>、若数字滤波器的单位脉冲响应</span></span>h</span>(</span></span>n</span>)是对称的,长度为</span></span>N</span>,则它的对称中心是</span></span></u>。</span></span></span></p>A.N/2B.</span>(</span></span>N-1</span>)</span></span>/2C.</span>(</span></span>N/2</span>)</span></span>-1D.</span>不确定</span></span></span></p>7</span></span>、若正弦序列x(n)=sin(30nπ/120)是周期的,则周期是N=</u>。</span></span></span></p>A.2</span>π</span></span>B.4</span>π</span></span>C.2D.8</span></span></p>8</span>、一</span></span>LTI</span>系统,输入为</span></span>x</span>(</span></span>n</span>)时,输出为</span></span>y</span>(</span></span>n</span>)</span></span>;则输入为</span></span>2x</span>(</span></span>n</span>)时,输出为</span></span></u></span>;输入为</span></span>x</span>(</span></span>n-3</span>)时,输出为</span></span></u></span>。</span></span></span></p>2y</span>(</span></span>n</span>),</span></span>y</span>(</span></span>n-3</span>)</span></span>B.2y</span>(</span></span>n</span>),</span></span>y</span>(</span></span>n+3</span>)</span></span>C.y</span>(</span></span>n</span>),</span></span>y</span>(</span></span>n-3</span>)</span></span></span></li></ol>D.y</span>(</span></span>n</span>),</span></span>y</span>(</span></span>n+3</span>)</span></span></span></p>9</span></span>、用窗函数法设计FIR数字滤波器时,加矩形窗时所设计出的滤波器,其过渡带比加三角窗时</u>,阻带衰减比加三角窗时</u>。</span></span></span></p>A.</span>窄,小</span></span>B.</span>宽,小</span></span>C.</span>宽,大</span></span>D.</span>窄,大</span></span></span></p>10</span></span>、</span></span>在</span></span>N=32</span>的基</span></span>2</span>时间抽取法</span></span>FFT</span>运算流图中,从</span></span>x(n)</span>到</span></span>X(k)</span>需</span></span></u>级蝶形运算</span></span></span></p>过程。</span></span></span></p>A.4B.5C.6D.3</span></span></p>11</span></span>.X(n)=u(n)的偶对称部分为()。</span></span></span></p>.1/2+δ(n)/2B.1+δ(n)C.2δ(n)D.u(n)-δ(n)</span></span></span></li></ol>12.</span></span>下列关系正确的为()。</span></span></span></p>A</span></span>.</span></span>B.</span></span></span></span></span></p>C</span></span>.</span></span>D.</span></span></span></span></span></p>13</span></span>.下面描述中最适合离散傅立叶变换DFT的是()A.时域为离散序列,频域也为离散序列B.时域为离散有限长序列,频域也为离散有限长序列C.时域为离散无限长序列,频域为连续周期信号D.时域为离散周期序列,频域也为离散周期序列</span></span></span></p>14</span></span>.脉冲响应不变法()A.无混频,线性频率关系B.有混频,线性频率关系C.无混频,非线性频率关系D.有混频,非线性频率关系</span></span></span></p>15</span></span>.双线性变换法()A.无混频,线性频率关系B.有混频,线性频率关系C.无混频,非线性频率关系D.有混频,非线性频率关系</span></span></span></p>16</span></span>.对于序列的傅立叶变换而言,其信号的特点是()A.时域连续非周期,频域连续非周期B.时域离散周期,频域连续非周期C.时域离散非周期,频域连续非周期D.时域离散非周期,频域连续周期</span></span></span></p>17</span></span>.设系统的单位抽样响应为h(n),则系统因果的充要条件为()A.当n>0时,h(n)=0B.当n>0时,h(n)≠0C.当n<0时,h(n)=0D.当n<0时,h(n)≠0</span></span></span></p>18.</span></span></span>若一模拟信号为带限,且对其抽样满足奈奎斯特条件,则只要将抽样信号通过</span></span>()</span></span></span>即可完全不失真恢复原信号。</span></span></span></p>A.</span></span></span>理想低通滤波器</span></span>B.</span></span></span>理想高通滤波器</span></span></span></p>C.</span></span></span>理想带通滤波器</span></span>D.</span></span></span>理想带阻滤波器</span></span></span></p>19.</span></span></span>若一线性移不变系统当输入为</span></span>x(n)=δ(n)</span></span></span>时输出为</span></span>y(n)=R3</sub>(n)</span></span></span>,则当输入为</span></span>u(n)-u(n-2)</span></span></span>时输出为</span></span>()</span></span></span>。</span></span></span></p>3</sub>(n)B.R2</sub>(n)</span></span></span></span></li>3</sub>(n)+R3</sub>(n-1)D.R2</sub>(n)+R2</sub>(n-1)</span></span></span></span></li></ol>20.</span></span></span>下列哪一个单位抽样响应所表示的系统不是因果系统</span></span>?()</span></span></span></span></p>A.h(n)=δ(n)B.h(n)=u(n)</span></span></span></span></li>C.h(n)=u(n)-u(n-1)D.h(n)=u(n)-u(n+1)</span></span></span></span></li></ol>21.</span></span></span>一个线性移不变系统稳定的充分必要条件是其系统函数的收敛域包括</span></span>()</span></span></span>。</span></span></span></p>A.</span></span></span>单位圆</span></span>B.</span></span></span>原点</span></span></span></p>C.</span></span></span>实轴</span></span>D.</span></span></span>虚轴</span></span></span></p>22.</span></span></span>已知序列</span></span>Z</span></span></span>变换的收敛域为|</span></span>z</span></span></span>|</span></span><1</span></span></span>,则该序列为</span></span>()</span></span></span>。</span></span></span></p>A.</span></span></span>有限长序列</span></span>B.</span></span></span>无限长右边序列</span></span></span></p>C.</span></span></span>无限长左边序列</span></span>D.</span></span></span>无限长双边序列</span></span></span></p>23.</span></span></span>实序列的傅里叶变换必是</span></span>()</span></span></span>。</span></span></span></p>A.</span></span></span>共轭对称函数</span></span>B.</span></span></span>共轭反对称函数</span></span></span></p>C.</span></span></span>奇函数</span></span>D.</span></span></span>偶函数</span></span></span></p>24.</span></span></span>若序列的长度为</span></span>M</span></span></span>,要能够由频域抽样信号</span></span>X(k)</span></span></span>恢复原序列,而不发生时域混叠现象,则频域抽样点数</span></span>N</span></span></span>需满足的条件是</span></span>()</span></span></span>。</span></span></span></p>A.N≥MB.N≤M</span></span></span></span></p>C.N≤2MD.N≥2M</span></span></span></span></p>25.</span></span></span>用按时间抽取</span></span>FFT</span></span></span>计算</span></span>N</span></span></span>点</span></span>DFT</span></span></span>所需的复数乘法次数与</span></span>()</span></span></span>成正比。</span></span></span></p>A.NB.N2</sup></span></span></span></span></p>C.N3</sup>D.Nlog2</sub>N</span></span></span></span></p>26.</span></span></span>以下对双线性变换的描述中不正确的是</span></span>()</span></span></span>。</span></span></span></p>A.</span></span></span>双线性变换是一种非线性变换</span></span></span></p>B.</span></span></span>双线性变换可以用来进行数字频率与模拟频率间的变换</span></span></span></p>C.</span></span></span>双线性变换把</span></span>s</span></span></span>平面的左半平面单值映射到</span></span>z</span></span></span>平面的单位圆内</span></span></span></p>D.</span></span></span>以上说法都不对</span></span></span></p>27.</span></span></span>以下对</span></span>FIR</span></span></span>和</span></span>IIR</span></span></span>滤波器特性的论述中不正确的是</span></span>()</span></span></span>。</span></span></span></p>A.FIR</span></span></span>滤波器主要采用递归结构</span></span></span></p>B.IIR</span></span></span>滤波器不易做到线性相位</span></span></span></p>C.FIR</span></span></span>滤波器总是稳定的</span></span></span></p>D.IIR滤波器主要用来设计规格化的频率特性为分段常数的标准滤波器</span></p>28</span>、设系统的单位抽样响应为</span></span>h(n)=</span>δ</span></span>(n-1)+</span>δ</span></span>(n+1)</span>,其频率响应为(</span></span>)</span></span></span></p>A</span>.</span></span>H(ej</sup></span>ω</span></span></sup>)=2cos</span>ω</span></span>B.H(ej</sup></span>ω</span></span></sup>)=2sin</span>ω</span></span>C.H(ej</sup></span>ω</span></span></sup>)=cos</span>ω</span></span>D.H(ej</sup></span>ω</span></span></sup>)=sin</span>ω</span></span></span></p>29.</span></span>若x(n)为实序列,</b>X(ej</sup>ω</sup>)是其离散时间傅立叶变换,则()</span></span></span></p>A</span></span>.X(ej</sup>ω</sup>)的幅度合幅角都是ω的偶函数</span></span></span></p>B</span></span>.X(ej</sup>ω</sup>)的幅度是ω的奇函数,幅角是ω的偶函数</span></span></span></p>C</span></span>.X(ej</sup>ω</sup>)的幅度是ω的偶函数,幅角是ω的奇函数</span></span></span></p>D</span></span>.X(ej</sup>ω</sup>)的幅度合幅角都是ω的奇函数</span></span></span></p>30.</span>计算两个N1点和N2点序列的线性卷积,其中N1>N2,至少要做()点的DFT。</span></p>A.</span>N1B.N1+N2-1C.N1+N2+1D.N2</span></p>
- 智慧职教: 写出下列常用结构构件的代号名称:</span>B</font> </font> [填空(1)]</button> </font></span></span> </span></span>、</span>L</font> </font> [填空(2)]</button> </font></span></span> </span></span>、</span>QL</font> </font> [填空(3)]</button> </font></span></span> </span>、</span>J</font> </font> [填空(4)]</button> </font></span></span> </span>、</span>Z</font> </font> [填空(5)]</button> </font></span></span> </span>、</span>GL</font> </font> [填空(6)]</button> </font></span></span> </span>。</span></p>
- 的值为</span></span>(</span></span>)</span></p></p></cc>
- 在</span>20</span>世纪</span>30</span>年代后期和</span>40</span>年代前期,毛泽东从哪些方面系统地阐明了新民主主义理论</span></p>
内容
- 0
图示2.8电路中通过电感的电流为()</span></p></span></span></p></span></p></span></p></span>图2.8</span></p></p></cc>
- 1
(</span></span> </span>)是军队用于判断方位的常用工具。</span></span></p>
- 2
<p>18<span style="font-family:宋体">下期末复习指南</span></p> <p><span style="font-family:宋体">一、总评成绩</span></p> <p>100<span style="font-family:宋体">分由三部分构成:</span></p> <p>1.<span style="font-family:宋体">平时成绩(</span>30%<span style="font-family:宋体">):含考勤、课堂互动、作业</span></p> <p>2.<span style="font-family:宋体">实践成绩(</span>10%<span style="font-family:宋体">):即微故事成绩</span></p> <p>3.<span style="font-family:宋体">期末成绩(</span>60%<span style="font-family:宋体">):闭卷考试分数</span></p> <p><span style="font-family:宋体">二、期末考试</span></p> <p>1.<span style="font-family:宋体">考试时间:教务处统一组考(一般在</span>18<span style="font-family:宋体">或</span>19<span style="font-family:宋体">周左右)</span></p> <p>2.<span style="font-family:宋体">考试形式:书面闭卷</span></p> <p>3.<span style="font-family:宋体">考试题型:单选,多选,判断,问答(含简答和论述),材料分析。</span></p> <p>4.<span style="font-family:宋体">题量分值:</span></p> <p><span style="font-family:宋体">单选:</span>15<span style="font-family:宋体">个,</span>30<span style="font-family:宋体">分;</span></p> <p><span style="font-family:宋体">多选:</span>5<span style="font-family:宋体">个,</span>10<span style="font-family:宋体">分;</span></p> <p><span style="font-family:宋体">判断:</span>10<span style="font-family:宋体">个,</span>10<span style="font-family:宋体">分;</span></p> <p><span style="font-family:宋体">问答:</span>3<span style="font-family:宋体">个,</span>30<span style="font-family:宋体">分;</span></p> <p><span style="font-family:宋体">材料分析:</span>1<span style="font-family:宋体">个,</span>20<span style="font-family:宋体">分。</span></p> <p>5.<span style="font-family:宋体">答题要求:材料分析题要求答题在</span>800<span style="font-family:宋体">字以上。</span></p> <p><span style="font-family:宋体">三、复习资料</span></p> <p>1.<span style="font-family:宋体">资料一:教材《马克思主义基本原理概论》。以本为本,万变不离其宗。客观题全面涵盖了导论和七章。建议先通读教材,跟所有内容混个面熟,再精读教材,掌握重点、突破难点,把书本变薄。</span></p> <p>2.<span style="font-family:宋体">资料二:课程作业</span>10<span style="font-family:宋体">道题。这是问答和材料分析题的出题之首选。</span>10<span style="font-family:宋体">道题涵盖了导论和七章,导论部分一般会以客观题的形式出题,主观题主要在后面七章,作业第</span>2-10<span style="font-family:宋体">题务必认真详实地做题。建议根据题意,拓展知识点,把题目内含的概念、观点和原理弄懂吃透,该背的还得背下来,因为问答题不像选择和判断,内容是必须要写出来的,材料分析题更是要将原理消化才能答好题。</span></p> <p>3.<span style="font-family:宋体">资料三:《</span>19<span style="font-family:宋体">政治</span>1000<span style="font-family:宋体">题习题刷题练习》。文档开学就已下发。前半部分是习题,后半部分是参考答案和题释。</span></p> <p><span style="font-family:宋体">四、复习指导</span></p> <p>1.<span style="font-family:宋体">导论部分一般会以客观题的形式出题,比如马恩的生平、马克思主义的创立和发展、马克思主义的鲜明特征、当代价值。</span></p> <p>2.<span style="font-family:宋体">第</span>1<span style="font-family:宋体">章辩证唯物主义是重中之重,分值占比较大,各种题型都可出题。比如列宁的物质定义及理论意义、物质和意识的辩证关系、联系的观点、发展的观点、联系和发展的基本环节即五对范畴、对立统一规律(含矛盾的同一性斗争性、普遍性特殊性、主次矛盾等)、质量互变规律、否定之否定规律。三大规律尤其是对立统一规律、质量互变规律要重点复习。复习时要求吃透原理,做到活学活用。换句话说,如果给出一则或几则材料,能熟练地运用辩证法或唯物论或唯物史观的相关原理进行科学合理地分析。</span></p> <p>3.<span style="font-family:宋体">第</span>2<span style="font-family:宋体">章认识论、真理观和价值论都会有考题。</span></p> <p>4.<span style="font-family:宋体">第</span>3<span style="font-family:宋体">章历史唯物主义,人民群众是历史创造者的原理,习近平的以人民为中心的思想。</span></p> <p>5.<span style="font-family:宋体">第</span>4<span style="font-family:宋体">章劳动价值论和剩余价值论都是必须掌握的基础知识。</span></p> <p>6.<span style="font-family:宋体">第</span>5<span style="font-family:宋体">章当代资本主义新变化的表现、原因和实质。</span></p> <p>7.<span style="font-family:宋体">第</span>6<span style="font-family:宋体">章关于科学社会主义的一般原则有</span>9<span style="font-family:宋体">条,关于“两个必然、两个绝不会”的内容及联系都是重点。</span></p> <p>8.<span style="font-family:宋体">第</span>7<span style="font-family:宋体">章关于预见未来社会的科学方法论原则、共产主义社会的基本特征、共同理想和远大理想。</span></p> <p>9.<span style="font-family:宋体">关于人与自然,第一、三、六章都有谈到。</span></p> <p>10.<span style="font-family:宋体">单选、多选、判断和简答会出现在各个章节中,复习时不能拘泥于以上列出的部分知识点。</span></p> <p>11.<span style="font-family:宋体">材料题是开放式的,不制定标准答案,但一定要联系原理。相关原理不止一个,但至少要有一个原理正确才会给分,乱用原理无分,牵强附会还得扣分。只说原理不联系材料也不给分,以防有人投机取巧,罗列一堆原理。字数</span>800<span style="font-family:宋体">字左右,少了会酌情扣分。</span></p> <p><span style="font-family:宋体">五、材料分析题样本</span></p> <p><span style="font-family:宋体">朝美关系:二战期间,朝鲜和美国都是反法西斯阵营的成员。</span>1950<span style="font-family:宋体">年朝鲜战争爆发,美朝关系敌对。</span>1953<span style="font-family:宋体">年</span>7<span style="font-family:宋体">月</span>27<span style="font-family:宋体">日签署了《朝鲜停战协定》,南北朝鲜停战,但并没签署和平条约,以至朝韩、朝美敌对状态持续。为应对美韩的敌对行为,朝鲜实行先军政治,优先发展军事,并进行核武器研发。美国等发起对朝鲜的制裁。</span>2018<span style="font-family:宋体">年</span>4<span style="font-family:宋体">月</span>27<span style="font-family:宋体">日,朝鲜最高领导人金正恩和韩国最高领导人文在寅见面。随即,美国和朝鲜宣布了朝美见面的意向。朝鲜宣布停止核试验。</span></p> <p><span style="font-family:宋体">试用马克思主义原理分析以上材料(要求有原理有分析,</span>800<span style="font-family:宋体">字左右)</span></p> <p><span style="font-family:宋体">六、必背原理</span></p> <p>1.<span style="font-family:宋体">物质和意识的辩证关系原理(世界的统一性在于物质性原理)</span></p> <p>2.<span style="font-family:宋体">矛盾的同一性和斗争性辩证关系原理</span></p> <p>3.<span style="font-family:宋体">矛盾的普遍性和特殊性的辩证关系原理</span></p> <p>4.<span style="font-family:宋体">量变和质变的辩证关系原理</span></p> <p>5.<span style="font-family:宋体">否定之否定规律</span></p> <p>6.<span style="font-family:宋体">原因与结果辩证关系原理</span></p> <p>7.<span style="font-family:宋体">现象与本质辩证关系原理</span></p> <p>8.<span style="font-family:宋体">内容与形式辩证关系原理</span></p> <p>9.<span style="font-family:宋体">必然性和偶然性辩证关系原理</span></p> <p>10.<span style="font-family:宋体">现实性与可能性辩证关系原理</span></p> <p>11.<span style="font-family:宋体">内因和外因的辩证关系原理</span></p> <p>12.<span style="font-family:宋体">实践与认识辩证关系原理</span></p> <p>13.<span style="font-family:宋体">真理与价值辩证关系原理</span></p> <p>14.<span style="font-family:宋体">社会存在和社会意识的辩证关系原理</span></p> <p>15.<span style="font-family:宋体">生产力和生产关系、经济基础和上层建筑的关系原理(人类社会的基本矛盾是社会发展的根本动力)</span></p> <p>16.<span style="font-family:宋体">生产力是社会发展的最终决定力量</span>(<span style="font-family:宋体">阶级社会的阶级斗争是直接动力</span>)</p> <p>17.<span style="font-family:宋体">社会规律和人的自觉活动的辩证关系原理</span></p> <p>18.<span style="font-family:宋体">人民群众是历史的创造者,是历史的主体,是推动社会历史发展的决定性力量</span></p> <p>19.<span style="font-family:宋体">社会发展的历史进程的原理</span>(<span style="font-family:宋体">包括社会发展过程中的决定性与主体选择性的统一、社会发展过程的统一性和多样性的统一,社会发展过程的前进性和曲折性的统一</span>)</p> <p>20.<span style="font-family:宋体">人的本质和人的价值原理。人的发展和社会发展辩证关系原理</span></p>
- 3
智慧职教: <p><span style=";font-family:宋体;font-size:19px"><span style="font-family:宋体">以下属于移动营销的特点是(</span> <span style="font-family:宋体">)</span></span></p><p><br/></p>
- 4
智慧职教: 在下列哪种情形下,人民法院应当为被告人指定辩护人?</span>( </span> </span>)</span></p>