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问题 单项选择题

反映生产工序随时间变化而发生的质量变动的状态，即反映生产过程中各个阶段质量波动状态的图形。这种方法是（）

A、直方图法

B、相关图

C、排列图法

D、控制图法

答案

参考答案：D

解答题

李老师从早上7时上班，晚上7时下班，中午休息2时，李老师一天工作多少小时？
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单项选择题

One ofthe main resposibilities of ICMP is to report(1).Although technology has produced increasingly relaible transmission media, errors still exist and must be handled. IP is an (2) protocol. This means that error checking and error control are not a concern of IP. ICMP was designed, in part, to compensate for this shortcoming. Howerver, ICMP does not (3) errors, it simply report them. Error correction is left to the higher-level potocols. Error messages are always sent to the original (4) because the only information available in the datagram about the route is the source and destination IP addresses. ICMP use the source IP address to sent the error massage to the source of the (5).

空白（5）处应选择（）

A.datagram

B.frame

C.service

D.protocol
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