When was Valentine supposedly executed? A: This was on February 14, 269 A.D.. B: This was on March 14, 269 A.D.. C: This was on July 7, 269 A.D.. D: This was on January 14, 269 A.D..
When was Valentine supposedly executed? A: This was on February 14, 269 A.D.. B: This was on March 14, 269 A.D.. C: This was on July 7, 269 A.D.. D: This was on January 14, 269 A.D..
设函数f(x)为连续函数,满足,则f(2)=(). A: -8 B: 8 C: 48 D: -48
设函数f(x)为连续函数,满足,则f(2)=(). A: -8 B: 8 C: 48 D: -48
已知x=48,y=0,s='A'， 则表达式： x>=y&&s<'D' &&!y的值是
已知x=48,y=0,s='A'， 则表达式： x>=y&&s<'D' &&!y的值是
十进制数269转换成十六进制数是
十进制数269转换成十六进制数是
x=127，y=48，请编写程序输出x与y加、减、乘、除的结果
x=127，y=48，请编写程序输出x与y加、减、乘、除的结果
十进制数269转换成16进制数为（）。
十进制数269转换成16进制数为（）。
十进制数269转换成十六进制数是10D。( )
十进制数269转换成十六进制数是10D。( )
It was on February 14, 269 A. D. that Valentine supposedly executed
It was on February 14, 269 A. D. that Valentine supposedly executed
《史晨碑》刻于公元()年。 A: 169 B: 269
《史晨碑》刻于公元()年。 A: 169 B: 269
某数字通信系统的接收信号矢量为[img=9x19]180368337abc8aa.png[/img]，发送码元“0”的条件概率密度函数为[img=38x25]18036833826aa99.png[/img]，先验概率为[img=35x25]180368338a723bd.png[/img]，判决区域为[img=20x22]1803683393082e2.png[/img]；发送码元“1”的条件概率密度函数为[img=38x25]180368339c47cd5.png[/img]，先验概率为[img=35x25]18036833a4742c3.png[/img]，判决区域为[img=20x22]18036833ad299e4.png[/img]，则该数字通信系统的码元错误概率为 。 A: [img=269x48]18036833b773a13.png[/img] B: [img=269x48]18036833c106b8f.png[/img] C: [img=269x48]18036833cbc5fd2.png[/img] D: [img=269x48]18036833d6afdfe.png[/img]
某数字通信系统的接收信号矢量为[img=9x19]180368337abc8aa.png[/img]，发送码元“0”的条件概率密度函数为[img=38x25]18036833826aa99.png[/img]，先验概率为[img=35x25]180368338a723bd.png[/img]，判决区域为[img=20x22]1803683393082e2.png[/img]；发送码元“1”的条件概率密度函数为[img=38x25]180368339c47cd5.png[/img]，先验概率为[img=35x25]18036833a4742c3.png[/img]，判决区域为[img=20x22]18036833ad299e4.png[/img]，则该数字通信系统的码元错误概率为 。 A: [img=269x48]18036833b773a13.png[/img] B: [img=269x48]18036833c106b8f.png[/img] C: [img=269x48]18036833cbc5fd2.png[/img] D: [img=269x48]18036833d6afdfe.png[/img]