问题 单项选择题

下列叙述中正确的是

A.数据的逻辑结构与存储结构必定一一对应

B.由于计算机存储空间是向量式的存储结构。因此,数据的存储结构一定是线性结构

C.程序设计语言中的数组一般是顺序存储结构,因此,利用数组只能处理线性结构

D.以上三种说法都不对

答案

参考答案:D

解析: 一种数据的逻辑结构根据需要可以表示成多种存储结构,因此,数据的逻辑结构与存储结构不一定是一一对应的,因此选项A错误。 计算机的存储空间是向量式的存储结构,但一种数据的逻辑结构根据需要可以表示成多种存储结构,如线性链表是线性表的链式存储结构,数据的存储结构不一定是线性结构,因此选项B错误。 数组一般是顺序存储结构,但利用数组也能处理非线性结构。选项C错误。故应选选项D。

阅读理解

It can be dangerous to travel by sea. Ships sometimes sink(下沉) far away from land. When this happens, the sailors(海员) have to get into small boats. If another ship does not come and help them and they do not have enough food or water, they will die.

Most people believe we must not drink sea water. They believe that if we do, we shall be very ill because of all the salt in the water. A doctor called Alain Bombard did not believe this. He thought that people could stay alive by drinking sea water and eating small fish, animals and plants from the sea. On 19 October 1953, he set out in a small boat to cross the Atlantic Ocean(大西洋). He did not take any food or water with him.

Every day Dr. Bombard drank just a little sea water. He also caught fish and they had water in them. He drank this water. He could not cook the fish, so he ate them as they were. He took small plants from the sea, which gave him more food.

Dr. Bombard became hot, tired and quite ill, but after 65days at sea he was still alive. He traveled 2,750 miles from one side of the Atlantic Ocean to the other, and on 24th,December 1953, he reached Barbados.

He lost 20 kilos, but he showed that people could live on sea water, the animals and plants in the sea.

小题1:Alain Bombard was ______.

A.an old sailor

B.a fisherman

C.a cook

D.a doctor小题2:He wanted to show that _____.

A.sea water was dangerous

B.sailors often died

C.people could drink sea water and not die

D.fish were good for people小题3:He went across ______.

A.a large ocean

B.a town

C.a boat

D.a ship小题4: Dr. Bombard lived on ______.

A.sea water

B.food that he cooked

C.only fish

D.sea water, fish and small plants小题5:The story is about _____.

A.drinking sea water

B.a dying sailor

C.a kind doctor

D.eating good food

单项选择题