[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fBn1lg0omhXkGm2-RcpJCKvx35sAzC1FjzxiMlKI-S3k":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-06-25 14:18:33",155328745,[8,9,10,11],"1","0","-1","出错",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},140,"b90771ba39aa23633e760a92314f2074","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3310115a82db216807be8665a174aace.jpg","单片机技术应用（学银在线）","exam_128785520","第二套题","设有语句&quot;int a=2,b=3,c=-2,d=2;&quot;,则逻辑表达式&quot;a&gt;0&amp;&amp;b&amp;&amp;c&lt;0&amp;&amp;d&gt;0&quot;的值是",[21,32,41,50,59,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],155328738,[25,26,27,28],"结束循环","结束本次循环","结束选择语句","结束整个程序","break语句用在switch case语句中的作用是什么呢","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],155328740,[36,37,38,39],"键盘扫描方式","单独读取","按行读取","按列读取","矩阵式键盘工作原理是()",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],155328743,[45,46,47,48],"读锁存","读数据","读A累加器","读CPU","MCS-51的并行I\u002FO口信息有两种读取方法,一种是读引脚,还有一种是",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],155328744,[54,55,56,57],"亮","灭","闪一下","一直闪","如果现在LED是点亮状态,请问执行下面一个语句后,LED的状态是什么? LED=~LED",{"answer":60,"createTime":5,"id":6,"options":61,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],155328748,[66,67,68,69],"RAM","ROM","cpu","pc","控制程序需要下载到单片机的(),才可以工作",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],155328751,[75,76,77,78],"外部中断1","外部中断0","定时器1","定时器0","MCS-51单片机在同一级别里除串行口外,级别最低的中断源是",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],155328753,[84,85,86,87],"选择工作寄存器区号","指示复位","选择定时器","选择工作方式","PSW中的RS1和RS0用来( )",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],155328757,[93,94,95,96],"a&gt;=10 or a&lt;=0","a&gt;=0|a&lt;=10","a&gt;=10 &amp;&amp;a&lt;=0","a&gt;=10‖a&lt;=0","能正确表示逻辑关系:&quot;a&ge;=10或a&le;0&quot;的C语言表达式是",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],155328760,[102,103,104,105],"精确度高","速度快","成本低","能与数据处理结合","使用单片机实现在线控制的好处不包括"]