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电 流： 电荷的定向移动叫做电流。电路中

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say();
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function say()
{
var now=new Date()
var day_of_week=now.getDay();
var day_of_month=now.getDate();
var month=now.getMonth();
var year=now.getYear();
var hour = now.getHours();
var rq="";
var say="";
month++;
rq=year+"年"+month+"月"+day_of_month+"日"+"<br>";
if(day_of_week==0)rq+="星期日";
if(day_of_week==1)rq+="星期一";
if(day_of_week==2)rq+="星期二";
if(day_of_week==3)rq+="星期三";
if(day_of_week==4)rq+="星期四";
if(day_of_week==5)rq+="星期五";
if(day_of_week==6)rq+="星期六";
rq="今天是<br>"+rq+"<br>"
if(hour < 6){say="凌晨好!<BR>新的一天开始了"}
else if (hour < 9){say="早上好!<BR>新的一天要有新的开始！"}
else if (hour < 12){say="上午好!<BR>要保持好心情！"}
else if (hour < 13){say="精神这么好,看来不用午睡了！"}
else if (hour < 14){say="百二秦川终属楚，坚持到底！"}
else if (hour < 17){say="下午好！<BR>对生活要充满热情！"}
else if (hour < 19){say="吃晚饭了吗?<BR>身体是革命的本钱呀！"}
else if (hour < 23){say="大好时间，不要浪费！"}
else {say="夜深了,还没睡！<BR>身体是革命的本钱呀！"}
document.write(rq);
document.write(say);
}