犯罪：沃尔玛是如何防止自助结账时的盗窃的

<span><br /></span><span><br /></span><p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica,Arial,sans-serif;hyphens:auto;text-align:justify;" data-flag="normal"><a target="_top" style="color:#4990E2;text-decoration:none;"><span><span>How does Walmart prevent theft when customers use self-checkout?</span></span></a></p><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /></span><p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica,Arial,sans-serif;hyphens:auto;text-align:justify;" data-flag="normal"><span><span><span><a style="color:#4990E2;text-decoration:none;">Mark Johnston</a></span></span><span>, former EFL Teacher (2005-2012)</span></span></p><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /></span><span><br /><...