[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fangRlIDo-BtJ858nuuMyJUokA3RCDfU5CCoZUlj-r2o":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":21,"type":22},[],"2025-12-28 06:49:24",290042163,[8,9,10,11],"低电平","高电平","不确定状态","无效状态",{"courseId":13,"courseImg":14,"courseName":15},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","当单片机复位时,P0-P3口的状态为( )",[18,23,32,41,50,59,66,75,84,92],{"answer":19,"createTime":5,"id":6,"options":20,"question":16,"source":21,"type":22},[],[8,9,10,11],"v1",0,{"answer":24,"createTime":5,"id":25,"options":26,"question":31,"source":21,"type":22},[],290042164,[27,28,29,30],"RAM","ROM","寄存器","CPU","单片机应用程序一般存放在( )",{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":21,"type":22},[],290042165,[36,37,38,39],"累加器","控制器","程序存储器","数据存储器","在单片机中,通常将一些中间计算结果存放在( )中",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":21,"type":22},[],290042166,[45,46,47,48],"0,0","0,1","1,0","1,1","为了使10H-17H作工作寄存器使用,RS1、RS0的取值为( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":21,"type":22},[],290042167,[54,55,56,57],"栈底单元","7FH","栈底单元地址加1","栈底单元地址减1","在堆栈操作中,当进栈数据全部弹出后,这时SP应指向( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":65,"source":21,"type":22},[],290042168,[9,8,63,64],"高低电平均可","有效电平","若不使用51片内的存储器,EA引脚必须接( )",{"answer":67,"createTime":5,"id":68,"options":69,"question":74,"source":21,"type":22},[],290042169,[70,71,72,73],"源程序","汇编程序","目标程序","编译程序","单片机能直接运行的程序叫( )",{"answer":76,"createTime":5,"id":77,"options":78,"question":83,"source":21,"type":22},[],290042170,[79,80,81,82],"1","2","4","8","一个字节(BYTE)由( )位二进制数组成",{"answer":85,"createTime":5,"id":86,"options":87,"question":91,"source":21,"type":22},[],290042171,[88,89,29,90],"数据","函数","变量","C语言是由( )组成的",{"answer":93,"createTime":5,"id":94,"options":95,"question":100,"source":21,"type":22},[],290042172,[96,97,98,99],"-128~+128","0~65535","0~255","0或1","C51中的unsigned char型数据的值域是( )"]