—_____ do you want to see a film?
—On weekend.[ ]
A. What
B. How
C. When
D. Where
答案:C
The Border Gateway Protocol (BGP) is an interautonomous system () protocol. The primary function of a BGP speaking system is to exchange network () information with other BGP system. This network reachability information includes information on the list of Autonomous System (ASs) that reachability information traverses. BGP-4 provides a new set of mechanisms for Supporting () interdomain routing. These mechanisms include support for advertising an IP () and eliminate the concept of network class within BGP. BGP-4 also introduces mechanisms that allow aggregation of routes, including () of AS paths. These changes provide support for the proposed supernettting scheme.
BGP-4 provides a new set of mechanisms for Supporting () interdomain routing.
A.answerless
B.connectionless
C.confirmless
D.classless
树叶叶片不仅可以吸收一些有害气体,还可以利用光能把二氧化碳转化为淀粉和氧气,起到改善环境的作用.通常晴天时,每天每平方米叶片可吸收5g二氧化碳来进行光合作用,则:
(1)某公园中叶片面积约为100万平方米,在一个月(按20个晴天计)内可以吸收二氧化碳气体______.
(2)空气中二氧化碳含量增加会引起“温室效应”,导致地球气候变暖.
①空气中二氧化碳的主要来源是______,
②为了防止温室效应的产生可以采取的措施是______.