• 2021-04-14 问题

    下列程序的输出结果是() num = 27 count = 0 while num > 0: if num % 2 == 0: num /=2 elif num % 3 ==0: num /= 3 else: num -=1 count += 1 print (count)

    下列程序的输出结果是() num = 27 count = 0 while num > 0: if num % 2 == 0: num /=2 elif num % 3 ==0: num /= 3 else: num -=1 count += 1 print (count)

  • 2022-05-29 问题

    以下不能实现统计各个部门男教师的人数的命令是? A: db.teachers.aggregate([{$match:{"sex":"男"}},{$group:{"_id":{"dept":"$dept"},"num_count":{$sum:1}}}]) B: db.teachers.aggregate([{$group:{"_id":{"dept":"$dept"},"num_count":{$sum:1}}},{$match:{"sex":"男"}}]) C: db.teachers.group({"key":{"dept":2},"initial":{"count":0},"reduce":function(cur,result){return result.count++},"cond":{"sex":"男"}}) D: db.teachers.runCommand({"group":{"ns":"teachers","key":{"dept":0},"initial":{"count":0},"$reduce": function(cur,result){result.count++;},"cond":{"sex":"男"}}})

    以下不能实现统计各个部门男教师的人数的命令是? A: db.teachers.aggregate([{$match:{"sex":"男"}},{$group:{"_id":{"dept":"$dept"},"num_count":{$sum:1}}}]) B: db.teachers.aggregate([{$group:{"_id":{"dept":"$dept"},"num_count":{$sum:1}}},{$match:{"sex":"男"}}]) C: db.teachers.group({"key":{"dept":2},"initial":{"count":0},"reduce":function(cur,result){return result.count++},"cond":{"sex":"男"}}) D: db.teachers.runCommand({"group":{"ns":"teachers","key":{"dept":0},"initial":{"count":0},"$reduce": function(cur,result){result.count++;},"cond":{"sex":"男"}}})

  • 2022-11-03 问题

    获得数组元素值的个数的函数是()。 A: num() B: coun() C: count() D: con()

    获得数组元素值的个数的函数是()。 A: num() B: coun() C: count() D: con()

  • 2021-04-14 问题

    关于属性的使用正确的是? private int num;public string Num{get{return num;};set{num=value;}}|private int num;private int Num{get{return num;}set{num=value;}}|private int num;public int Num{get{return num;}set{num=value;}}|private int num;public int Num{get{num=value;}set{return num;}}

    关于属性的使用正确的是? private int num;public string Num{get{return num;};set{num=value;}}|private int num;private int Num{get{return num;}set{num=value;}}|private int num;public int Num{get{return num;}set{num=value;}}|private int num;public int Num{get{num=value;}set{return num;}}

  • 2022-05-29 问题

    中国大学MOOC: @num = (3,5,2,1,4);@num = sort(@num);push(@num, (6,7,8,9));pop(@num);shift(@num);执行以上语句后,@num=?

    中国大学MOOC: @num = (3,5,2,1,4);@num = sort(@num);push(@num, (6,7,8,9));pop(@num);shift(@num);执行以上语句后,@num=?

  • 2022-05-29 问题

    关于属性的使用正确的是 A: private int num;public string Num{get{return num;} set{num=value;}} B: private int num;public int Num{get{return num;}set{num=value;}} C: private int num;public int Num{get{num=value;}set{return num;}} D: private int num;private int Num{get{return num;}set{num=value;}}

    关于属性的使用正确的是 A: private int num;public string Num{get{return num;} set{num=value;}} B: private int num;public int Num{get{return num;}set{num=value;}} C: private int num;public int Num{get{num=value;}set{return num;}} D: private int num;private int Num{get{return num;}set{num=value;}}

  • 2022-05-29 问题

    unsignedcharnum;num=0X98;num=num%10;num=num%10;num=?() A: 15 B: 8 C: 9 D: 2

    unsignedcharnum;num=0X98;num=num%10;num=num%10;num=?() A: 15 B: 8 C: 9 D: 2

  • 2022-06-07 问题

    3、描述“变量num取值范围为10--100或为负数”的逻辑表达式为()。 A: ( num>;10 || num<;100 ) &amp;&amp; (num<;0 ) B: ( num>;10 || num<;100 ) || (num<;0 ) C: ( num>;10 &amp;&amp; num<;100 ) &amp;&amp; (num<;0 ) D: ( num>;10 &amp;&amp; num<;100 ) || (num<;0 )

    3、描述“变量num取值范围为10--100或为负数”的逻辑表达式为()。 A: ( num>;10 || num<;100 ) &amp;&amp; (num<;0 ) B: ( num>;10 || num<;100 ) || (num<;0 ) C: ( num>;10 &amp;&amp; num<;100 ) &amp;&amp; (num<;0 ) D: ( num>;10 &amp;&amp; num<;100 ) || (num<;0 )

  • 2022-05-29 问题

    num=float(input('输入一个数字:\n'))<br/>num=int(num)<br/>num=int((num+5)/2)<br/>num=num*2-5<br/>num=int(num%5)<br/>print(num)输入:14.5输出:______

    num=float(input('输入一个数字:\n'))<br/>num=int(num)<br/>num=int((num+5)/2)<br/>num=num*2-5<br/>num=int(num%5)<br/>print(num)输入:14.5输出:______

  • 2022-06-08 问题

    单片机的P34、P35、P36、P37口分别接发光二极管LED1、LED2、LED3、LED4,输出低电平点亮LED,读下列程序:#include<;reg51.h>;unsigned char count=0,num=0;void main(){TMOD|=0x01; // @11.0592MHzTL0=0xCD; //设置定时初值 2msTH0=0xF8; //设置定时初值TR0=1;ET0=1;EA=1;while(1);}void timer0_ISR(void) interrupt 1{TL0=0xCD; //设置定时初值TH0=0xF8; //设置定时初值if(++count >;= 250){count=0;P3=~(num <;<; 4);num++;if( num >;= 16 )num=0;}} A: 由四个LED灯组成的0-15的自动加法计数器; B: 定时500ms后加1; C: 定时1s后加1; D: 计数器加到15后清零,重新计数。

    单片机的P34、P35、P36、P37口分别接发光二极管LED1、LED2、LED3、LED4,输出低电平点亮LED,读下列程序:#include<;reg51.h>;unsigned char count=0,num=0;void main(){TMOD|=0x01; // @11.0592MHzTL0=0xCD; //设置定时初值 2msTH0=0xF8; //设置定时初值TR0=1;ET0=1;EA=1;while(1);}void timer0_ISR(void) interrupt 1{TL0=0xCD; //设置定时初值TH0=0xF8; //设置定时初值if(++count >;= 250){count=0;P3=~(num <;<; 4);num++;if( num >;= 16 )num=0;}} A: 由四个LED灯组成的0-15的自动加法计数器; B: 定时500ms后加1; C: 定时1s后加1; D: 计数器加到15后清零,重新计数。

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