cheerio取不出图

var request = require('request');
var cheerio = require("cheerio");
url='https://sy.taobao.com/serviceDetail.htm?spm=a310t.2279757.1998552523.31.CsYUEM&serviceCode=FW_GOODS-1000003451&tracelog=search&scm=&ppath=';
request(url,function (error, response, body){
	  var body=response.body;
console.log(body);
	var $ = cheerio.load(body);
	 $("img").each(function(){
	   console.log($(this).html());
	 });
});

打印body是有内容，但是img一个都匹配不出来