[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fAGBwQ1JWzBIFCgt_3sr9R38SiZmE4OxhoNI0H20yv0g":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":26,"type":71},[],"2025-05-22 01:33:01",189839543,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},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)","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",[17,28,34,39,48,57,66,72,77,82],{"answer":18,"createTime":5,"id":19,"options":20,"question":25,"source":26,"type":27},[],189839534,[21,22,23,24],"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":29,"createTime":5,"id":30,"options":31,"question":33,"source":26,"type":27},[],189839535,[21,22,23,32],"灯一直亮,不闪","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":36,"options":37,"question":38,"source":26,"type":27},[],189839536,[21,22,23,32],"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( )",{"answer":40,"createTime":5,"id":41,"options":42,"question":47,"source":26,"type":27},[],189839537,[43,44,45,46],"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":49,"createTime":5,"id":50,"options":51,"question":56,"source":26,"type":27},[],189839538,[52,53,54,55],"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":58,"createTime":5,"id":59,"options":60,"question":65,"source":26,"type":27},[],189839539,[61,62,63,64],"CAP","BUTTON","CRYSTAL","CAP-ELEC","在Proteus仿真中,晶振的元件名是( )",{"answer":67,"createTime":5,"id":68,"options":69,"question":70,"source":26,"type":71},[],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":73,"createTime":5,"id":74,"options":75,"question":76,"source":26,"type":71},[],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":78,"createTime":5,"id":79,"options":80,"question":81,"source":26,"type":71},[],189839542,[],"B=( )H;250=( )B=( )H;9EH=( )B=( )D;1010 1011B=( )H=( )D",{"answer":83,"createTime":5,"id":6,"options":84,"question":15,"source":26,"type":71},[],[]]