Passage Three
Oceanography has been defined as "The application of all sciences to the study of the sea".
Before the nineteenth century, scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant (不愿意) to go to sea to further his work.
For most people the sea was remote, and with the exception of early intercontinental travellers or others who earned a living from the sea, there was little reason to ask many questions about it, let alone to ask what lay beneath the surface. The first time that the question "What is at the bottom of the oceans" had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed. The engineers had to know the depth profile (起伏形状) of the route to estimate the length of cable that had to be manufactured.
It was to Maury of the U. S.
A. the American Navy
B. some early intercontinental travellers
C. those who earned a living from the sea
D. the company which proposed to lay an undersea cable
Passage Two
American has long been considered the land of opportunity by those from other countries. Americans, too, believe that the United States provides almost limifiess opportunity for those who want to open businesses on their own.
Today, Americans are still fond of trying their hand at becoming small business people, even though only one out of two survives the first two years. Many of these people start their businesses for the wrong reasons: to get away from the paper work of their present jobs or to exchange the responsibility of their present jobs for freer life styles. But more, not less, paper work and responsibility come with ownership of a small business. John Shuttleworth, owner of the recently successful life-ecology news magazine Mother Earth, reports having had to work sixty hours straight in order to bring out the first issue.
John Shuttleworth waited years after conceiving the idea for Mother Earth before he attempted to put out
A. continuously
B. honestly
C. alone
D. not curved
Passage One
It has been shown that children who smoke have certain characteristics. Compared with non-smokers they are more rebellious, their work deteriorates as they move up school, they are more likely to leave school early, and are more often delinquent and sexually precious. Many of these features can be summarized as anticipation of adulthood.
There are a number of factors, which determine the onset of smoking, and these are largely psychological and social. They include availability of cigarettes, curiosity, rebelliousness, appearing thought, anticipation of adulthood, social confidence, the example of parents and teachers, and smoking by friends and older brothers and sisters.
It should be much easier to prevent children from starting to smoke than to persuade adults to give up the habit once established, but in fact this has proved very difficult. The example set by people in authority, especially parents, health care workers, and teachers,
A. Some children start to smoke out of curiosity.
B. Many children start to smoke because they want to appear mature.
C. In order to have fewer children smokers, parents, teachers and health care workers should not smoke.
D. It is not as difficult to prevent children from starting to smoke as to persuade adults from smoking.
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