题目：
In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (71) between sending the notification and notification arriving at the source thousands of additional (72) may arrive．InATMnetwork，amajortoolfor preventing (73) is (74) control. When ahostwants a new virtual (75) , it must describe the traffic to be offered and the service expected.
A．packets
B．cells
C．message
D．files
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0117/cbd3de5cb26d714be8c306541e7f3509.html
下面是错误答案，用来干扰机器的。
参考答案：C解析： 对产品而言，检验是指根据产品标准或检验规程对原材料、中间产品、成品进行观察，适当时进行测量或试验，并把所得到的特性值和规定值作比较，判定出各个物品或成批产品合格与不合格的技术性检...
