【名词&注释】
网络通信(network communication)、同轴电缆(coaxial cable)、双绞线(twisted-pair)、网络带宽(network bandwidth)、供需平衡(balance of supply and demand)、开放系统(open system)、网络地址(network address)、绝大多数(most)、关键所在、得出结论(conclusion that)
[单选题]不管你使用哪种牙膏，经常刷牙将降低你牙齿腐烂的可能性。科学家得出结论(conclusion that)：当刷牙时，拟通过去除牙齿与牙龈上所形成的牙菌斑薄片以减少牙齿腐烂。因此你可以不用加氟牙膏，只要认真刷牙就能告别蛀牙。下面哪一个是对上面推论的一个批评?( )
A. 用加氟牙膏刷牙表明可以降低牙齿腐烂。
B. 刷牙将减少牙齿腐烂的事实并没有表明氟无价值。
C. 几乎没有人通过刷牙可以充分地消除牙菌斑。
D. 在绝大多数(most)时间内，人们的牙齿上都有牙菌斑。
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举一反三：
[单选题]用路由器把一个网络分段，这样做的好处是(1)。
A. 网络中不再有广播通信，所有的数据都通过路由转发器转发
B. 路由器比交换机更有效率
C. 路由器可以对分组进行过滤
D. 路由器可以减少传输延迟
[多选题]试题(71)～(75)The analysis phase answers the questions of who will use the system, what the system will do, and where and when it will be used. During this phase, the project team investigates ny current system,identifies (71) , and develops a concept for the new system. This phase as three steps: first, (72) is developed to guide the project team's efforts. It usually ncludes an analysis of the current system and its problems, and the ways to design a new ystem. The next step is (73) The analysis ofthis information - in conjunction withinput rom the project sponsor and many other people - leads to the development of a concept for a ew system. The system concept is then used as a basis to develop a set ofbusiness analysis odels that describes how the business will operate if the new system were developed. The set of models typically includes models that represent the (74) necessary to support the nderlying business process. Last, the analyses, system concepts, and models are combined nto a document called the (75), which is presented to the project sponsor and other key ecision makers that decide whether the project should continue to move forward.
A. improvementopportunities
B. logicalmodel
C. systemrequirements
D. systemarchitecture
E. a user manual
F. an analysis strategy
G. an analysis use case
H. a design user case
I. project scope definition
J. prob,lems analysis
K. decisionanalysis
L. requirementsgathering
M. dataandprocesses
N. systeminfrastructures
O. externalagents
P. systemsoftware
Q. requirementsstatement
R. designspecification
S. systemproposal
T. project charter
[单选题]●假定某农贸市场上鸡蛋的需求和供给曲线可以由下列方程表示：Qd=100+10P
A. Qs=540-40P
B. 其中，Qd为该市场鸡蛋的需求量（公斤），Qs为该市场鸡蛋的供给量（公斤），P为每公斤鸡蛋的价格，则市场上鸡蛋价格P为(70)元／公斤时，达到供需平衡。
C. 10
D. 9.2
E. 8.8
F. 14
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