题目内容
（请给出正确答案）
A.定义对象间的一种一对多的依赖关系，当一个对象的状态发生改变时，所有依赖于它的对象都得到通知并被自动更新
B. 表示一个作用于某对象结构中的各元素的操作
C. 在不破坏封装性的前提下，捕获一个对象的内部状态，并在该对象之外保存这个状态。这样以后就可将该对象恢复到原先保存的状态
D. 用原型实例指定创建对象的种类，并且通过拷贝这些原型创建新的对象
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更多“以下意图哪个是用来描述VISITOR（访问者）？（）”相关的问题
第1题
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A．Visitor(访问者)
B．Observer(观察者)
C．Flyweight(享元)
D．Prototype(原型)
第2题
A．如果需要对用户的访问请求进行提问(Challenge)，则网络访问服务器(NAS)对用户密码进行加密；并发送给RADIUS认证服务器
B．通过RADIUS协议可以识别非法的用户，并记录闯入者的日期和时间
C．在这种C/S协议中，服务器端是网络访问服务器(NAS)，客户端是RADIUS认证服务器
D．网络访问服务器(NAS)与RADIUS认证服务器之间通过UDP数据报交换请求/响应信息
第4题
Dullness and loneliness were common problems of the families who generally lived distant from one another. Strangers and travelers were welcome sources of diversion, and brought news of the outside world. The harsh realities of the frontier also shaped this tradition of hospitality.
Someone traveling alone, if hungry, injured, or ill, often had nowhere to turn except to the nearest cabin or settlement. It was not a matter of choice for the traveler or merely a charitable impulse on the part of the settlers. It reflected the harshness of daily life: if you didn’t take in the stranger and take care of him, there was no one else who would. And someday, remember, you might be in the same situation. Today there are many charitable organizations which specialize in helping the weary traveler. Yet, the old tradition of hospitality to strangers is still very strong in the US, especially in the smaller cities and towns away from the busy tourist trails. "I was just traveling through, got talking with this American, and pretty soon he invited me home for dinner - amazing." Such observations reported by visitors to the US are not uncommon, but are not always understood properly.
The casual friendliness of many Americans should be interpreted neither as superficial nor as artificial, but as the result of a historically developed cultural tradition. As is true of any developed society, in America a complex set of cultural signals, assumptions, and conventions underlies all social interrelationships. And, of course, speaking a language does not necessarily mean that someone understands social and cultural patterns. Visitors who fail to "translate" cultural meanings properly often draw wrong conclusions. For example, when an American uses the word "friend", the cultural implications of the word may be quite different from those it has in the visitor’s language and culture. It takes more than a brief encounter on a bus to distinguish between courteous convention and individual interest. Yet, being friendly is a virtue that many Americans value highly and expect from both neighbors and strangers.
1.In the eyes of visitors from the outside world, ___________.
A.rude taxi drivers are rarely seen in the US
B.small-minded officials deserve a serious comment
C.Canadians are not so friendly as their neighbors
D.most Americans are ready to offer help
2.It could be inferred from the last paragraph that ___________.
A.culture exercises an influence over social interrelationship
B.courteous convention and individual interest are interrelated
C.various virtues manifest themselves exclusively among friends
D.social interrelationships equal the complex set of cultural conventions
3.Families in frontier settlements used to entertain strangers ___________.
A.to improve their hard life
B.in view of their long-distance travel
C.to add some flavor to their own daily life
D.out of a charitable impulse
4.The tradition of hospitality to strangers ___________.
A.tends to be superficial and artificial
B.is generally well kept up in the United States
C.is always understood properly
D.has something to do with the busy tourist trails
5.What’s the author’s attitudes toward the American’s friendliness?
A.Favorable.
B.Unfavorable.
C.Indifferent.
D.Neutral.
第6题
A. 访客由于网络原因未到达推广页面
B. 网站无法访问
C. 出现了无效点击
D. 一些访问者通过广告来访后，又多次通过收藏夹对网站进行回访
第9题
A、独立用户数比较真实地描述了网站访问者的实际数量
B、网站独立访问者数量可用于不同类型网站访问量的比较分析
C、网站独立访问者数量可用于同一网站在不同时期访问量的比较分析
D、以独立用户为基础可反映网站访问者的多项行为指标
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