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【单选题】
以下不属于计算机外部设备的是A.
输入设备
B.
中央处理器
C.
输出设备
D.
外存储器
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皮皮学刷刷变学霸
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【简答题】Over the years, (1) working hours have shrunk, people found that they had more free time on their (2) to spend on leisurely activities. Sitting home with a book could only (3) so far, and thus an enti...
【简答题】某单片机 P0 口与 8 个发光二极管相连,当引脚为低电平时,发光二极管点亮,试编程使它们轮流点亮(跑马灯效果,汇编使用延时函数 DELAY ; C 语言提供 void delay_nms(unsigned char i) 函数 ) 。
【简答题】某单片机 P0 口与 8 个发光二极管相连,当引脚为低电平时,发光二极管点亮,请编写彩灯闪烁程序。 ( 汇编使用延时函数 DELAY ; C 语言提供 void delay_nms(unsigned char i) 函数 )
【简答题】某单片机 P0 口与 8 个灯相连, P0.0 控制灯 D0 ,P0.1 控制灯 D1,依次类推 , 当引脚为低电平时,灯点亮,请编写控制程序,使 D0 、 D2 、 D4 、 D6 灯,与 D1 、 D3 、 D5 、 D7 灯交替闪烁。 ( 汇编使用延时函数 DELAY ; C 语言提供 void delay_nms(unsigned char i) 函数 )
【简答题】Over the years, (1) working hours have shrunk, people found that they had more free time on their (2) to spend on leisurely activities. Sitting home with a book could only (3) so far, and thus an enti...
【简答题】Over the years, (1) working hours have shrunk, people found that they had more free time on their (2) to spend on leisurely activities. Sitting home with a book could only (3) so far, and thus an enti...
【简答题】Over the years, (1) working hours have shrunk, people found that they had more free time on their (2) to spend on leisurely activities. Sitting home with a book could only (3) so far, and thus an enti...
【单选题】下列哪项属于慢性阻塞性肺病?( )
A.
慢支、哮喘、肺气肿
B.
慢支、支扩、哮喘
C.
没有气流阻塞的慢支、肺气肿
D.
有气流不可逆阻塞的慢支、肺气肿
E.
有气流阻塞的哮喘、支气管扩张
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