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问题 单项选择题

男性，65岁，腹痛、腹胀、停止排气排便2天，3年前曾行阑尾切除术，立位腹平片示右下腹可见2个小肠气液平面，应诊断为( )

A．阑尾残株炎
B．克罗恩病
C．溃疡性结肠炎
D．粘连性肠梗阻
E．胆囊炎

答案

参考答案：D

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（2）处应选择（）

A.reliable

B.unreliable

C.available

D.unavailable
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问答题 简答题

新生儿败血症是怎样发生的？早期常见哪些症状？
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