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Have you ever been on a student exchange program? How useful was it. We asked three people for their opinions. Ellen:I spent 8 days in Germany when I was studying for my Level A. I went to school every day, and spent the evenings with a family. It was great that I had to speak German all the time. However, the most useful thing was that I was paying more attention to communicating in the language, instead of speaking perfect correct German. I was really glad that people could understand what I was saying. I'd certainly introduce it to other students studying languages. Frank:I went on an exchange with my class for a week in Japan. Before the exchange, I thought my understanding of grammar was pretty good, but I had much trouble in listening and speaking. So, What I thought most meaningful was that I had no choice but to use everyday language skills, rather than the language from books. If I had the opportunity, I'd certainly take part in another language exchange. Alice:I took part in a French exchange. It lasted two weeks and I stayed with my exchange family in a small town just outside Paris. I'm quite a shy person, so in the first few days, I was kind of nervous, but then it was fine. I love French and my French has always been good. But the exchange really helped develop my speaking skills, and made me a much more confident (自信的) person. It felt great to be able to talk with French people. I also found the everyone who took part in the exchange did a lot better in their end of year exams.
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【单选题】下列关于算法的叙述正确的是()
A.
算法就是操作使用计算机的方法
B.
算法可采用介于自然语言和程序设计语言之间的“伪代码”来描述
C.
算法是给程序员参考的,允许有二义性
D.
算法允许得不到所求问题的解答
【单选题】下列关于算法的叙述正确的是()
A.
算法是一种运算符号
B.
算法是一种只对数进行运算的方法
C.
算法是一种程序
D.
算法是对特定问题求解步骤的一种描述或程序
【单选题】济南郊区的小林一家春节去大名湖游玩,按旅游区域划分,这属于( )
A.
方性旅游
B.
区域性旅游
C.
国性旅游
D.
光旅游
【单选题】下列关于算法的叙述正确的是()。
A.
算法中有待执行的运算和操作必须是相当基本的
B.
一个算法至少有一个输入和一个输出
C.
为了使算法更加的简洁,算法的每一个步骤不必确切地定义,计算机会自己识别
D.
一个算法的步骤可以是无穷的
【单选题】个体在群体的压力下,放弃自己的意见,采取和大多数人一致的意见的行为是( )
A.
群体行为
B.
从众行为
C.
自觉行为
D.
胁迫行为
【多选题】下列关于算法的叙述正确的是( )。
A.
所谓时间复杂度是指最坏情况下,估算算法执行时间的一个上界。
B.
算法的优劣与算法描述语言无关,与所用计算机也无关。
C.
用不同算法求解同一问题的时间复杂度不同。
D.
算法的有穷性是指算法必须能在执行有限个步骤之后终止。
【单选题】济南郊区的小林一家春节去大名湖游玩,按旅游区域划分,这属于()
A.
地方性旅游:
B.
区域性旅游
C.
全国性旅游
D.
观光旅游 回答正确
【单选题】下列关于算法的叙述正确的是()
A.
算法就是程序
B.
设计算法时只需要考虑数据结构的设计
C.
设计算法时只需要考虑结果的可靠性
D.
以上三种说;法都不对
【单选题】济南郊区的小林一家春节去大名湖游玩 , 按旅游区域划分 , 这属于
A.
地方性旅游
B.
区域性旅游
C.
全国性旅游
D.
观光旅游
【单选题】算法设计是编写程序的基础。下列关于算法的叙述正确的是
A.
算法必须产生正确的结果
B.
算法可以没有输出
C.
算法必须具有确定性
D.
算法的表示必须使计算机能理解
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