你好，麻烦再帮我看看，轮播图为何不显示

wxml:

<swiper indicator-dots="{{indicatorDots}}"

   autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}">

   <block wx:for="{{imgUrls}}">

     <swiper-item>

       <image src="{{item}}"  class=“slide-image” mode=“aspectFill” />

     </swiper-item>

   </block>

</swiper>

js:

data:{

   indicatorDots: true,

   autoplay: true,

   circular: true,

   interval: 5000,

   duration: 1000,

   imgUrls: [

     ‘…/tp/f1.jpg’,

     ‘…/tp/1.jpg’,

     ‘…/tp/3.png’,

     ‘…/tp/2.png’,

   ]

}