试题库在线考试题库-历年真题模拟试题及答案-考博英语在线试题测试中心-希赛网

海南大学

The success of modern agricultural and forestry production can largely be attributed to monoculture systems using a few select species and heavy chemical inputs. This drive for maximizing yield and profit has caused serious environmental problems such as land and water degradation and increased land-clearing. Modern agriculture is thus threatening its own foundations: land, water, forests, and biodiversity. During the past thirty years, however, the positive benefits of integrated land-use systems to the producer and the environment have gradually been recognized. Combining trees and crops in spatial or temporal arrangements has shown to improve food and nutritional security and mitigate environmental degradation, offering a sustainable alternative to monoculture production.

Ripening is a developmental process unique to plants, and biochemical and molecular basis of this process are not fully understood. Three key areas under investigation including elucidating the role of ethylene in fruit ripening. Identifying major regulatory components involved in the ripening of all fleshy fruits, and modifying fruit quality, especially with respect to nutrition and health.

Directions: For this part, you are asked to write a composition on the following topic. You should write at least 150 words on the Answer Sheet and you should base your composition on the outline below:How Will Our Life Go on without Internet?1.网络提供给了人们丰富多彩和便捷的生活；2.很多人开始感觉离开网络寸步难行；3.你对网络依赖症的看法。

A language is a signaling system which operates with symbolic vocal sounds (语声) , and which is used by a group of people for the purpose of communication.Let’s look at this _1_in more detail because it is language, more than anything else, _2_ distinguishes man from the rest of the _3_ world.Other animals, it is true, communicate with one another by _4_ of cries: for example, many birds utter _5_ calls at the approach of danger; monkeys utter _6_ cries, such as expressions of anger, fear and pleasure. _7_ these various means of communication differ in important ways _8_ human language. For instance, animals’ cries do not _9_ thoughts and feelings clearly. This means, basically, that they lack structure. They lack the kind of structure that _10_ us to divide a human utterance into _11_ .We can change an utterance by _12_ one word in it with _13_: a good illustration of this is a soldier who can say, e.g., “tanks approaching from the north”, _14_ who can change one word and say “aircraft approaching from the north” or “tanks approaching from the west”; but a bird has a single alarm cry, _15_ means “Danger!” This is why the number of _16_ that an animal can make is very limited: the great tit (山雀) is a case _17_ point; it has about twenty different calls, _18_ in human language the number of possible utterances is _19_. It also explains why animal cries are very _20_ in meaning.

In previous generations, young people were under their parents’ control; now the teenage children of the West’s richest generation were ready for something to get excited about. The Beatles simply put a spark to a fuse that was waiting to be lit.Everything changed, and what changed for the Beatles was their lives and their working habits, in the midst of the hysterical (歇斯底里的) following the band attracted. Because of the demand of the fans to see them perform, they played bigger and bigger venues (meeting places), especially in America.But John, Paul, George and Ringo became increasingly unhappy that, because of the screaming of their fans, neither the band nor the audience could hear the music. Creatively frustrated and tired of the pressures of life under siege from their fans, they retired from playing concerts in 1966 and decided to concentrate on recording.It was from this point that the brilliance of the Beatles really began to reveal itself: they would record over their career some 200 songs. Never before nor since has any recording and writing group even developed and yet remained the same in the way the Beatles did. Their songs never lost their universal appeal thanks to the warmth and timelessness of their melodies and lyrics.John and Paul were powerful singers with distinctive styles. It became apparent that, despite the fact that the song-writing credits were always equally attributed to them, Paul and John wrote and sang their own songs. George also contributed two or three of his own compositions to each of the Beatles’ eleven albums. Even Ringo wrote and sang the occasional song.1. Which of the following is NOT true about the Beatles according to the passage?2. It can be inferred from the passage that ______.3. It is implied in the third paragraph that ______.4. The Beatles’ outstanding qualities were really shown when ______.5. What can we learn about the Beatles’ music?

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