成考院校在线答案
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">21、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">已知某数的</span><span lang="EN-US">BCD</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">码为</span><span lang="EN-US">0111 0101 0100 0010 </span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">则其表示的十进制数值为（</span><span lang="EN-US"> </span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt; mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">18、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">若</span><span lang="EN-US">N</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">为整型变量，则</span><span lang="EN-US">for(N=10;N=0;N--);</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">循环里的循环体被（ ）。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">26、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">没有片内上拉电阻的并口是（</span><span lang="EN-US"> </span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt; mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] 10、已知变磁通式转速传感器的测速齿轮的齿数为20，若测得感应电动势的频率为300Hz， 则被测轴的转速为900r/min。（ ）
- 2022-09-12 [判断] 19、所有非周期信号都是能量信号。（ ）
- 2022-09-12 [判断] 12、用光电二极管二维阵列组成面型传感器测量物体的形状所得的图像的分辨率最高只能是一个像素。如果所测得图像长为1。对应N个像素，分辨率为1/N。假设N为200，则分辨率最高只能是1 /200。（ ）
- 2022-09-12 [判断] 2、一阶RC低通滤波器，当电阻R增大时，滤波器上限截止频率将会减小。（ ）
- 2022-09-12 [判断] 12、周期信号各次谐波的频率只能是基波频率的整数倍。（ ）
- 2022-09-12 [判断] 17、霍尔元件所产生的霍尔电势取决于元件所在磁场的磁感应强度。（ ）
- 2022-09-12 [判断] 6、一线性系统不满足“不失真测试”条件，若用它传输一个1000Hz的正弦信号，则必然导致输出波形失真。（ ）