var a=require( ". /b. js" );

console. log( name );

那么，在模块b.js中定义name 时，以下代码正确的是（）

function multi(x,y){

  console.log(‘a’)

setTimeout( function ( ){

  var ret=x* y

  return ret

console. log(' b’ )

 },0)

}

console. log( mult ( 3 ,6) )

 console.log(' a’ )

 setTimeout( function ( ){

  console. log(' b’ )

  var ret=x* y

  return ret

 },0)

}

console. log( mult ( 3 ,6) )

function multi( x, y,callback ){

 console. log(' a' )

 setTimeout( funetion ( ){

  console. log(' b' )

  var ret=x* y

  callback( ret )

 },0)

}

multi( 3 ,6,function (result ){

 console. log( result )

})

function multi ( x ,y , callback ){

 console. log(' a' )

 setTimeout( funetion ( ){

  var ret=x * y

  callback ( ret )

  console, log(' b' )

},0)

}

multi( 3 ,6 ,function ( result ){

 console. log( result )

})

var connection=mysql. createConnection({

 host :' localhost' ,

 user:'root',//根据自己数据库的账号

 password:'root',//根据自己数据库的密码

 database:'goprojec'//需连接的数据库名称

})

connection. connect( )

connection. query(' SELECT 1 + 1 AS result' , function (err, results, fields) {

 if(err){

  return console. log( err, message )

 }

 eonsole, log( results[ 0 ]. result)

})