[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fkfyo-jKVcxe5NpFEgjcVX6Zjn31UnLha66r_x1ZHKnk":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":27,"type":28},[],"2025-05-22 01:33:01",189839536,[8,9,10,11],"灯闪烁速度变快","灯闪烁速度变慢","灯闪烁速度不变","灯一直亮,不闪",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},16,"1b8fba6c7909506fd6205d6831e2bc32","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc39e10bdc7afa7f6859823bc165c31a2.png","单片机原理及应用（2025春 48学时）","work_41205669","8灯闪作业(第2周 2025.3.7)","在单灯闪程序中,把延时函数delay的参数从10000改为成100,程序下载到开发板后运行的结果是( )",[21,29,34,37,46,55,64,70,75,80],{"answer":22,"createTime":5,"id":23,"options":24,"question":26,"source":27,"type":28},[],189839534,[8,9,10,25],"灯一直亮,不闪烁","单灯闪程序如下,调用延时函数时把delay的参数从10000改为成60000,程序运行的结果是( ). #include <reg51.h> sbit LED = P1^0; \u002F\u002F定义P1.0引脚为位变量LED void delay(unsigned int t) \u002F\u002F延时函数 { unsigned int i; for(i=0;i<t;i++); } void main() { while (1) { LED = 0; \u002F\u002F引脚输出低电平,点亮小灯 delay(10000); \u002F\u002F调用延时函数 LED = 1; \u002F\u002F引脚输出高电平,熄灭小灯 delay(10000); \u002F\u002F调用延时函数 } }","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":33,"source":27,"type":28},[],189839535,[8,9,10,11],"在单灯闪程序中,调用延时函数时把delay的参数从60000改为成80000,程序运行的结果是( )",{"answer":35,"createTime":5,"id":6,"options":36,"question":19,"source":27,"type":28},[],[8,9,10,11],{"answer":38,"createTime":5,"id":39,"options":40,"question":45,"source":27,"type":28},[],189839537,[41,42,43,44],"复位","停止","连续运行","单步运行","在下图的µVision4运行和调试工具条中,左数第二个图标的功能是( ). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F454d93d67f091309d8111feb3fd5f956.png\">",{"answer":47,"createTime":5,"id":48,"options":49,"question":54,"source":27,"type":28},[],189839538,[50,51,52,53],"启动\u002F停止调试","打开\u002F关闭输出窗口","打开\u002F关闭工程窗口","清除全部断点","在下图的µVision4运行和调试工具条中,左数第三个图标的功能( ). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8cb6a5e7c66c066ed9e3d8cc47cbd193.png\">",{"answer":56,"createTime":5,"id":57,"options":58,"question":63,"source":27,"type":28},[],189839539,[59,60,61,62],"CAP","BUTTON","CRYSTAL","CAP-ELEC","在Proteus仿真中,晶振的元件名是( )",{"answer":65,"createTime":5,"id":66,"options":67,"question":68,"source":27,"type":69},[],189839540,[],"写语句:(1)定义P2口的P2.5引脚为一个位变量,变量名是new.( ); (2)用整体赋值的方式让P1口最低两位(P1.1和P1.0)接的两个发光二极管点亮(低电平点亮).( ); (3) 定义一个有符号整型变量 j 并赋初值为 -1000.( )",2,{"answer":71,"createTime":5,"id":72,"options":73,"question":74,"source":27,"type":69},[],189839541,[],"在下面的单灯闪程序中,当晶振频率为12MHZ时,延时时间约为120ms,若将延时参数从10000改为20000,此时的延时时间约为( )ms,若将延时参数从10000改为100,此时的延时时间约为( )ms,若将延时参数改为70000,此时的延时时间约为( )ms. 注:计算结果保留1位小数. #include <reg51.h> sbit LED = P1^0; \u002F\u002F定义P1.0引脚为位变量LED void delay(unsigned int t) \u002F\u002F延时函数 { unsigned int i; for(i=0;i<t;i++); } void main() { while (1) { LED = 0; \u002F\u002F引脚输出低电平,点亮小灯 delay(10000); \u002F\u002F调用延时函数,延时 LED = 1; \u002F\u002F引脚输出高电平,熄灭小灯 delay(10000); \u002F\u002F调用延时函数 } }",{"answer":76,"createTime":5,"id":77,"options":78,"question":79,"source":27,"type":69},[],189839542,[],"B=( )H;250=( )B=( )H;9EH=( )B=( )D;1010 1011B=( )H=( )D",{"answer":81,"createTime":5,"id":82,"options":83,"question":84,"source":27,"type":69},[],189839543,[],"3的ASCII码是( ‍)B 或( )H;大写字母E的ASCII码是( )B或( )H,字符 @ 的ASCII码是( )B或( )H"]