試題64.為了網(wǎng)絡(luò)的安全，常常使用防火墻技術(shù)。防火墻技術(shù)是 (64) 。

　　(64)A.為了控制網(wǎng)絡(luò)訪問而配置的硬件設(shè)備

　　B.為了防止病毒攻擊而編制的軟件

　　C.指建立在內(nèi)外網(wǎng)絡(luò)邊界上的過濾封鎖機(jī)制

　　D.為了避免發(fā)生火災(zāi)專門為網(wǎng)絡(luò)機(jī)房構(gòu)造的隔離墻

　　試題65.雙宿主機(jī)至少具有兩個(gè)網(wǎng)絡(luò)接口，分別連接內(nèi)外兩個(gè)網(wǎng)絡(luò)，兩個(gè)網(wǎng)卡之間的通信是 (65) 。

　　(65)A.直接通信

　　B. 直接轉(zhuǎn)發(fā)IP包

　　C. 通過軟件轉(zhuǎn)發(fā)IP包

　　D. 不進(jìn)行任何通信

　　試題66～70.Sequential circuit is a common logic device whose output values, at a given instant, depend upon its input values and the internal state at that instant, and whose internal state depends upon the (66) preceding inputvalues and the preceding internal state. A sequential circuit can assume a finite number of internal states and may therefore be regarded, from an abstract (67) , as a finite (68) .Combinational circuit is another logic device whose output values, at any given instant, depend upon the input values at that instant. A combinational circuit is a (69) of a sequential circuit whose internal state is not taken (70) .(66) A.directly B.immediately C.instantly D.snapshot

　　(67) A.idea B.observation C.point of view D.viewport

　　(68) A.automaton B.robot C.manipulator D.man-machine system

　　(69) A.counterexample B.specification C.particular D.special case

　　(70) A.calculation B.in account C.audit D.attention

　　試題71～75.Artificial intelligence(AI),an interdisciplinary field, is usually regarded as a branch of computer science, dealing with models and systems for the performance of functions generally associated with human intelligence, such as (71) and learning.In AI, knowledge-based system is an information (72) system that provides for solving problems in a particular domain or application area by drawing inferences from a knowledge base. Moreover, some knowledge-based systems have learning capabilities.Expert system (ES) indicates the knowledge-based system that provides for solving problems in a particular domain or application area by drawing inferences from a knowledge base developed from human (73) . Some expert systems are able to (74) their knowledge base and develop new inference rules based on their experience with previous problems. The term “expert system” is sometimes used (75) with “knowledge-based system”, but should be taken to emphasize expert knowledge.

　　(71) A.inferring B.reasoning C.deriving D.proving

　　(72) A.supervisory B.manipulating C.management D.processing

　　(73) A.experience B.know-how C.expertise D.skillfulness

　　(74) A.renew B.improve C.upgrade D.amend

　　(75) A.synonymously B.equivalently C.substitutionally D.homomorphously