共阳数码管和74HC595芯片连接如下图所示，执行下列程序后，数码管显示的图形为？（ ）void setup() {pinMode(32, OUTPUT);pinMode(33, OUTPUT);pinMode(34, OUTPUT);digitalWrite(34,LOW);shiftOut(32,33,MSBFIRST,0xAB);digitalWrite(34,HIGH);digitalWrite(34,LOW);}

ds883684 单选题 共 个子题

答案解析