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问题 单项选择题

自动磨边机水箱供给循环水换水时，（），倒掉废水，并清洗水箱内和过滤网上的粉垢。

A、请先清洗工作台，再取出水箱

B、请先停机，再取出水箱

C、请先拔掉电源插头，再取出水箱

D、请先关水阀，再取出水箱

答案

参考答案：C

问答题 简答题

既然出口国对本国的出口企业的补贴增加了进口国的福利，为什么进口国政府要征收反补贴税？
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单项选择题

BGP is an inter-autonomous system routing protocol; it is designed to be used between multiple autonomous ___40___. BGP assumes that routing within an autonomous system is done by an intra-autonomous system routing protocol. BGP does not make any assumptions about intra-autonomous system ___41___ protocols employed by the various autonomous systems. Specifically, BGP does not require all autonomous systems to run the same intra-autonomous system routing protocol.

BGP is a real inter-autonomous system routing protocol. It imposes no constraints on the underlying Internet topology. The information exchanged via BGP is sufficient to construct a graph of autonomous systems connectivity from which routing loops may be pruned and some routing. ___42___ decisions at the autonomous system level may be enforced.

The key feature of the protocol is the notion of Path Attributes. This feature provides BGP with flexibility and expandability. Path ___43___ are partitioned into well-known and optional. The provision for optional attributes allows experimentation that may involve a group of BGP ___44___without affecting the rest of the Internet. New optional attributes can be added to the protocol in much the same fashion as new options are added to the Telnet protocol, for instance.

44（）

A.routers 

B.states 

C.meters 

D.costs
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