问题 填空题

线性表的存储结构主要分为顺序存储结构和链式存储结构。队列是一种特殊的线性表,循环队列是队列的 (2) 存储结构。

答案

参考答案:顺序

解析: 本题考查数据结构的队列。队列是一种特殊的线性表,即限定在表的一端进行删除,在表的另一端进行插入操作的线性表。允许删除的一端叫做队头,允许插入的一端叫做队尾。线性表的存储结构主要分为顺序存储结构和链式存储结构。当队列用链式存储结构实现时,就称为链队列;当队列用顺序存储结构实现时,就称为循环表。因此,本题画线处应填入“顺序”。

阅读理解

Why do we like drinking water from plastic bottles? Some people think it is healthy and clean. Others drink bottled water because it’s easy — you can carry it around with you. In hot countries, like Greece, we often buy bottles of cold water in the summer.

However, making lots of plastic is not a good idea for many reasons. First of all, we need a lot of oil for plastic products. We usually use oil as a source(资源) of energy. If we reduced the number of bottles we made, we wouldn’t need so much oil. Plastic bottles also pollute the environment. If we recycled all our plastic bottles, we wouldn’t need so much space for rubbish dumps. But in Greece, we don’t recycle much of the plastic we use. In 2006, Greeks recycled only about 10% of plastic waste. The rest became rubbish on land and in rivers and sees. So next time you want to throw away a plastic bottle in the litter bin, stop and think. If you recycled it, you would help the environment. But what can you do when there isn’t a recycling bin near you? Well, there are loes of useful ways that you can use your bottles again. For example, an empty bottle makes a great piggy bank for your pocket money, and if you cut a bottle in half, you will have a plant pot. Go green! You can make a difference.

小题1:What is not mentioned about bottled water in this passage?

A.It’s healthy.

B.It’s clean.

C.It’s easy.

D.It’s expensive.小题2:Plastic products are made from         .

A.energy

B.oil

C.rubbish

D.plants小题3:        of plastic waste became rubbish in Greece in 2006.

A.10%

B.50%

C.80%

D.90%小题4: Which is the best way to deal with used plastic bottles?

A.To recycle them.

B.To make a piggy bank.

C.To make a plant pot.

D.To drop them into the river.小题5: The underlined part in this passage tells us “       ”.

A.To make a different life, you’d better go outside.

B.To look different, you’d better wear green clothes.

C.To protect the environment, you can do something.

D.To go green, you should use plastic products.

单项选择题