问题 单项选择题

下列叙述中,错误的是______。

A.数据的存储结构与数据处理的效率密切相关

B.数据的存储结构与数据处理的效率无关

C.数据的存储结构在计算机中所占的空间不一定是连续的

D.一种数据的逻辑结构可以有多种存储结构

答案

参考答案:B

解析: 数据的存储结构是数据的逻辑结构在计算机存储空间中的存放形式,也称数据的物理结构。一个数据结构中的各数据元素在计算机存储空间的位置与逻辑关系有可能不同。一种数据结构可根据需要采用不同的存储结构。常用的存储结构有顺序、链接、索引等存储方式。采用不同的存储结构,其数据处理的效率是不同。

单项选择题

Questions 63 TO 67 are based on the following passage:(10分)  Television,the modern wonder of electronics,brings the world into your own home in sight and sound.And the word‘television’means seeing far.Television works in much the same way as radio.In radio,sound is changed into electromagnetic waves which are sent through the air.Experiments leading to modern television took place more than a hundred years ago.By the 1920s inventors and researchers had turned,the early theories into working models.Yet it took another thirty years for TV to become industry. The influence of TV on the life of people is incalculable:it can influence their thoughts and their way of life.It can also add to their store of knowledge.Educational TV stations offer teaching in various subjects.Some hospitals use TV for medical students to get close-up views of operations. At first television programs were broadcast in black-and-white.With the development of science and technology,the problem of how to telecast them in full color was solved and by the middle 1960s the national networks were broadcasting most of their programs in color. The programs that people watch are not only local and national ones.Since the launching of the first communications satellite,more and more programs are telecast“live”from all over the world. People in San Francisco were able to watch the 1964 Olympic Games in Tokyo.And live telecasts now come from outer space.In 1969,the first astronauts to land on the moon televised their historic “moon walk”to viewers on the earth.Since then,astronauts have regularly sent telecast to the earth.

The television became an industry in________.

A.1950

B.the 1960s

C.the 1920s

D.the 1950s.

单项选择题