.item{

    max-width:48%;

    float:left;

    padding:2px;

    border-top:1px solid #000;

    border-left:1px solid #000;

}

.itemRight{

    border-right:1px solid #000;

}

　　　　　<div class="item">

            <img src="img/a.jpg" class="itemImg">

            <p class="itemTitle">物品1</p>

             <button class="bntAddShop fz12">加入清单</button>

            <button class="bntBuyShop fz12">马上购买</button>

        </div>

        <div class="item itemRight">

            <img src="img/a.jpg" class="itemImg">

            <p class="itemTitle">物品1</p>

             <button class="bntAddShop fz10">加入清单</button>

            <button class="bntBuyShop fz10">马上购买</button>

        </div>