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问题 单项选择题

人体实验是

A．以病人作为受试对象的试验
B．以人作为受试对象的试验
C．人体实验时必须要做到真正的知情同意
D．选择受试者的时候需遵循的
E．保障受试者身心安全

答案

参考答案：B

单项选择题

●One of the main resposibilities of ICMP is to report（）.Although technology has produced increasingly reliable transmission media, errors still exist and must be handled．IP is an （） 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（） errors，it simply reports them．Error correction is left to the higher-level potocols．Error messages are always sent to the original （） because the only information available in the datagram about the route is the source and destination IP addresses．ICMP uses the source IP address to send the error massage to the source of the （） .

IP is an （） protocol

A．reliable

B．unreliable

C．available

D．unavailable
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单项选择题

首先考虑诊断为

A．风疹

B．幼儿急疹

C．水痘

D．皮肤脓疱疮

E．疱疹型湿疹
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