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问题 单项选择题

下列紧急处理哪项不妥

A．皮下注射吗啡
B．氨茶碱0.25g静脉滴注
C．地塞米松20mg静脉滴注
D．硝普钠缓慢静脉滴注
E．呋喃苯胺酸40～80mg静脉注射

答案

参考答案：A

单项选择题 A型题

如果要了解脏器或四肢周围血管的情况，通常选择的超声检查仪器为（）

A.M型

B.D型

C.A型

D.B型

E.B+D型
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单项选择题

We have already covered the topic of network addresses. The first （1） in a block (in class A, B, and C) defines the network address. In classes A, B, and C, if the hosted is all 1 s, the addressis called a direct broadcast address. It is used by a （2）to send a packet to all hosts in a specificnetwork. All hosts will accept a packet having this type of destination address. Note that thisaddress can be used only as a （3） address in an IP packet. Note also that this special addressalso reduces the number if available hosted for each netid in classes A, B, and C.

In classes A, B, and C, an address with all 1 s for the netid and hosted (32 bits) define a （4） address in the current network. A host that wants to send a message to every other hosts can use this address as destinationaddress in an IP packet. However, a router will block a packet having this type of address to confine thebroadcasting to the （5） network. Note that this address belongs to class E.

（1）是（）

A.datagram

B.function

C.address

D.service
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