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【简答题】
Robbie Wilde has been enjoying his life as a 1 . He was born with perfect 2 , but is now completely 3 in his right ear and can hardly hear in his left. He grew up in a 4 home environment and started deejaying at age 5 . With a strong desire to perfect his skills, he asked a well-known DJ for 6 . He has been working hard and does not want his skills recognized simply because people have 7 for his disability. In this way, he sets a good example for other young people in chasing their 8 .
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【单选题】设有关系表S(NO,NAME,AGE),其中AGE为年龄字段,则表达式
A.
E NOT BETWEEN 18 AND 24 等价于：
B.
AGE<=18 OR AGE>=24
C.
AGE<=18 OR AGE>24
D.
AGE<18 OR AGE>=24
E.
AGE<18 OR AGE>24
【单选题】在下图所示电路中，当Di= 1 时，控制模拟开关Si 接电源【图片】； Di =0时，Si接地( i = 0,1,2,3)。已知【图片】= - 8V，【图片】，【图片】。设【图片】= 0V，4位集成加法计数器74160在时钟CP作用下连续工作，计数器的输出如图中虚线所示与D/A转换电路的数据端相连。试分析电路工作原理，电路输出【图片】的电压范围为 。【图片】
A.
-8V~0V
B.
-8V~ 7V
C.
0V~15V
D.
7V~9V
【单选题】Access中表达式“AGE BETWEEN 18 AND 24”等价于
A.
AGE>18 AND G<24< /div>
B.
AGE>=18 or G<=24< /div>
【单选题】若模/数转换器输出的二进制数的位数为10位，输入信号的范围为0~2.5V，则该转换器能分辨出的最小输入电压信号为（ ）
A.
1 .22mV
B.
2 .44mV
C.
3 .66mV
D.
4 .88 mV
【单选题】右图电路，A为8421BCD码十进制加法计数器，B为4位D/A转换器。已知计数器的初态为0000，D/A转换器输入0000～1111所对应的输出电压范围为0 ~ 4.5V，问第15个CP脉冲作用后U0 =( )。【图片】
A.
0V
B.
1.5V
C.
3.0V
D.
4.5V
相关题目：
【单选题】Access中表达式“AGE BETWEEN 18 AND 24”等价于
A.
AGE>18 AND G<24< /div>