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阅读下列短文, 从每题所给的四个选项(A、B、C和D)中, 选出最佳选项。 Th...

阅读下列短文, 从每题所给的四个选项(A、B、C和D)中, 选出最佳选项。

The ocean bottom, a region nearly 2.5 times greater than the total land area of the earth, is even today largely unexplored. Until about a century ago, the deep ocean floor was completely inaccessible and hidden beneath waters averaging over 3,600 meters deep. Totally without light and in the case of intense pressures hundreds of times greater than at the earth’s surface, the deep-ocean bottom is a strange environment to humans, in some way as frightening and remote as the outer space.

Although researchers have taken samples of deep-ocean rocks for over a century, the first detailed global study of the ocean bottom did not actually start until 1969, with the beginning of the National Science Foundation’s Deep Sea Drilling Project(DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP’s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill very deep waters, taking samples of rocks from the ocean floor.

The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, it sailed 600,000 kilometers and took almost 20,000 samples of rocks around the world. Those samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to make out what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger’s voyages, nearly all earth scientists agree on the theories of plate tectonics (构造学) and continental drift that explain many of the geological processes.

The sample of rocks drilled by the Glomar Challenger have also provided a climatic record stretching back hundreds of millions of years. The information of past climatic change can be used to predict the future climate.

1.What does the underlined word “inaccessible” in paragraph1 mean?

A. unrecognizable         B. unreachable

C. unusable               D. unreasonable

2.Which of the following is TRUE about the Glomar Challenger?

A. It is a military submarine.

B. It is used to develop tourism.

C. It has gone on over 100 voyages.

D. It made its first DSDP voyage in 1969.

3.The Deep Sea Drilling Project was significant because it was _____.

A. the first detailed exploration of the ocean bottom

B. conducted by geologists from all over the world

C. supported entirely by the gas and oil industry

D. an attempt to find new sources of oil and gas

 

1.B 2.D 3.A 【解析】 试题分析:本文属于科普说明文,主要介绍了人类运用现代技术对海底世界的探索过程。 1. 2. 3. 考点:考查科普说明文阅读
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The State Council submitted (提交) a bill which aims to allow couples to have two children if either parent is an only child. It focuses on adjusting and improving the family planning policy.

The State Council argues adjustment to the policy in the face of a steadily declining birth rate. The birth rate has remained relatively low and shows a tendency to fall further. The rate has dropped to between 1.5 and 1.6 since the 1990s, which means each Chinese woman of child-bearing age gives birth to 1.5 to 1.6 children on average. The working population began to drop in 2012 by 3.45 million every year, and it is likely to fall by 8 million each year after 2023.

The population aged 60 and above will reach 400 million and account for one-fourth of the total population in the early 2030s, up from one-seventh now.

“If the current family planning policy continues, the birth rate will continue to fall and lead to a sharp drop of the total population after reaching a peak,” said Li Bin, minister in charge of the National Health and Family Planning Commission.

“It is the right time to make changes: The low birth rate is stable, the working population is still large and the burden of supporting the elderly remains relatively light,” he added.

An increase in birth is expected if the policy changes but will not seriously affect the food supply, public education, health care or employment.

China’s food safety and public service plans are designed to meet the needs of 1.43 billion population in 2020 and 1.5 billion in 2033. Even with the policy change, the total population will reach no more than 1.38 billion in 2015, Li said.

1. Why did the State Council submit the bill?

A. To increase the population of Han nationality.

B. To balance the nature and society.

C. To develop the economy of China.

D. To solve the social population issue.

2.The new policy may have an effect on the following expect _____.

A. public education       B. the food supply

C. the divorce rate       D. employment

3.What can we learn about the population in China from the passage?

A. After the year of 2023, the population will become less and less.

B. There’s no need to carry out the family planning policy.

C. At the beginning of 2030s the aging problem will be worse than now.

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