2010年6月英语四级全真预测试卷及答案详解(3)

　　Questions 47 to 56 are based on the following passage

　　A sunflower is a sunflower. A mobile phone is a mobile phone. But can you 47 the two to do something for your local 48 ?

　　It may well be possible. When you have finished with your mobile phone you will be able to 49 it in the garden or a plant pot and wait for it to flower.

　　50 , a biodegradable (生物可降解的)mobile phone was introduced by scientists. It is hoped that the new type of phone will encourage 51 to recycle.

　　Scientists have come up with a new material over the last five years. It looks like any other 52 and can be hard or soft. and able to change shape. Overtime it can also break down into the soil without giving out any toxic 53 . British researchers used the new material to develop a phone cover that contains a sunflower seed. When this new type of cover turns into waste, it 54 nitrates(硝酸盐). These feed the seed and help the flower grow.

　　Engineers have designed a small 55 window to hold the seed. They have made sure it only grows when the phone is thrown away.

　　"We've only put sunflower seeds into the covers so far. But we are working with plant 56 to find out which flowers would perform best. Maybe we could put roses in next time," said one scientist.

　　[A] Recently

　　[B] consumers

　　[C] chemicals

　　[D] environment

　　[E] combine

　　[F] transparent

　　[G] buy

　　[H] companion [I] experts

　　[J] forms

　　[K] bury

　　[L] paper

　　[M] paper

　　[N] plastic

　　[O] Usually

　　Section B

　　Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked [A], [B], [C] and [D]. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the center.

　　Passage One

　　Questions 57 to 61 are based on the following passage.

　　It is difficult to imagine what life would be like without memory. The meanings of thousands of everyday perceptions, the basis for the decisions we make, and the roots of our habits and skills are to be found in our past experiences, which are brought into the present by memory.

　　Memory can be defined as the capacity to keep information available for later use. It not only includes "remembering" things like arithmetic or historical facts, but also involves any change in the way an animal typically behaves. Memory is involved when a rat gives up eating grain because he has sniffed (嗅出)something suspicious in the grain pile.

　　Memory exists not only in humans and animals but also in some physical objects and machines. Computers, for example, contain devices for storing data for later use. It is interesting to compare the memory storage capacity of a computer with that of a human being. The instant access memory of a large computer may hold up to 100,000 "words"—string of alphabetic or numerical characters—ready for instant use. An average U.S. teenager probably recognizes the meaning of about 100,000 words of English. However, this is but a fraction of the total amount of information that the teenager has stored. Consider, for example, the number of faces and places that the teenager can recognize on sight.

　　The use of words is the basis of the advanced problem-solving intelligence of human beings. A large part of a person's memory is in terms of words and combinations of words. But while language greatly expands the number and the king of things a person can remember, it also requires a huge memory capacity. It may well be this capacity that distinguishes humans, setting them apart from other animals.

　　57. Which of the following is TRUE about memory?

　　[A] It helps us perceive things happening around us every day.

　　[B] It is based on the decisions we made in the past.

　　[C] It is rooted in our past habits and skills.

　　[D] It connects our past experiences with the present.

　　58. According to the passage, memory is helpful in one's life in the following aspects EXCEPT that ________.

　　[A] it involves a change in one's behavior

　　[B] it keeps information for later use

　　[C] it warns people not to do things repeatedly

　　[D] it enables one to remember events that happened in the past

　　59. What is the author's view about computers and human beings in terms of intelligence?

　　[A] Computers have better memory than a child does.

　　[B] Computers are as intelligent as a teenager is.

　　[C] Computers can understand as many as 100,000 words.

　　[D] Human beings are far superior to computers.

　　60. What is the major characteristic of man's memory capacity according to the author?

　　[A] It can be expanded by language. [C] It may keep all the information in the past.

　　[B] It can remember all the combined words. [D] It may change what has been stored in it.

　　61. Human beings make themselves different from other animals by _______.

　　[A] having the ability to perceive danger

　　[B] having a far greater memory capacity

　　[C] having the ability to recognize faces and places on sight

　　[D] having the ability to draw on past experiences