1999年3月,英国坎多斯镇的史密斯先生收到了一张煤气费的欠款单,单上写着:欠费0.00元:他没在意,顺手将欠款单扔掉了。4月份,又收到了一张,他同样把它扔掉了。5月,史密斯收到煤气公司发给他的一张便条,说,如果再不交费,他们将停止煤气供应。史密斯打电话给煤气公司,煤气公司对史密斯解释道,是计算机出错了。过了一些日子,史密斯发现煤气被关闭了。他再次打电话给煤气公司,煤气公司声 In March 1999, Mr. Smith of Candos in England received an invoice for the gas bill, which read: Arrears of 0.00 yuan: He did not mind, and easily threw out the arrears bill. In April, another one was received, and he also threw it away. In May, Smith received a note from the gas company that they would stop gas supplies if they did not pay. Smith called the gas company, Smith explained gas company, is a computer error. Some days later, Smith found the gas was shut down. He again called the gas company, the gas company