摘要：<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>js</title> <script type="text/javascript"> var a='xutangshi' document.
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>js</title> <script type="text/javascript"> var a='xutangshi' document.write(a) </script> </head> <body> </body> </html> 检测变量类型 typeof +变量
批改老师：韦小宝批改时间：2018-11-10 09:30:25
老师总结：你这也太简单了吧！下次这样就不给过了！请认真对待每一次的作业！！！
