搜题请搜索小程序“爱下问搜题”
问题 选择题

       2008年4月巴黎议会通过了授予达赖喇嘛“荣誉市民”称号。2009年6月7日巴黎市长贝特朗·德拉诺埃不顾中国政府的强烈反对，正式向达赖颁发了这一称号。法国粗暴干涉中国内政，极大地伤害了中国人民的感情。自古以来，西藏就是中国领土不可缺少的一部分，下列史实能够有力证明的是

①唐朝时在西藏设置都督府

②元朝时西藏正式成为一个行政区

③清朝时达赖、班禅都必须经过中央政府册封

④清朝设置驻藏大臣，代表中央政府与达赖、班禅共管西藏事务 [ ]

A、①②③④

B、②③④

C、①②④

D、③④

答案

答案：B

单项选择题

当到达某一油温时，油品引火后所生成的火焰可以保持5秒钟，发生这种现象的最低油温称为（）。

A．闪点

B．闪火点

C．自燃点

D．燃点
查看答案
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.

（5）是（）

A.neighbor

B.next

C.remote

D.local
查看答案