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问题 单项选择题

为研究新旧两种仪器测量血生化指标的差异，分别用这两台仪器测量同一批样品，则统计检验方法应用（）

A.配对设计χ检验

B.成组设计u检验

C.配对设计t检验

D.配对设计u检验

E.成组设计t检验

答案

参考答案：C

单项选择题

One ofthe main resposibilities ofICMP is to report  （） . Although technology hasproduced increasingly relaible transmission media, errors still exist and must be handled. IP isan  （）  protocol. This means that error checking and error control are not a concem ofIP. ICMP was designed, in part, to compensate for this shortcoming. Howerver, ICMP doesnot  （） errors, it simply report them. Error correction is left to the higher-levelpotocols. Error messages are always sent to the original  （）  because the only informationavailable in the datagram about the route is the source and destination IP addresses. ICMP usethe source IP address to sent the error massage to the source ofthe（）.

IP isan（）protocol.

A．reliable

B．unreliable

C．available

D．unavailable
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单项选择题

血液运输O2的形式是（）

A.物理溶解

B.化学结合

C.AB两者兼具，化学结合为主

D.氧离为主

E.电离为主
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