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听力原文： Scientists believed that when the oceans were young, they contained only a trait

of salt, and that the level of salinity have been growing gradually. Over the years the rain had worn away the rocky mantle of the continents. Minerals released by this erosion had been carried to the sea by the flow of river water. This water added several million tons of salt to the ocean annually. There are other sources of oceanic salinity too. One source is under water volcanic action. This eruption occurs along the mid-ocean range and release great amount of salt each year. However these sources of salt don't increase the actual mineral composition of water by much, because of the enormous chemical requirements of marine life. Oyster, clam, snails and other louse use salt to build shells and skeletons. Coral reefs also contains large amount of salts. Also some salt leave the ocean through the process of evaporation. As salt escape into the atmosphere, they go into the creation of rain drops. This is why the coast received more rain than land area. You see, more salt existence in the atmosphere near the ocean, thereby attracting increased moisture and producing rain.

What is the topic of this talk？

A．The salinity of the ocean.

B．Pollutants found at sea.

C．The composition of coral reefs.

D．The weather patterns of coastal areas.

提问人：网友xiaobrown 发布时间：2022-01-06

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听力原文：Why does the woman think the speaker talked a lot of rubbish？（11)A．Because he bel

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A．Because he believes new kinds of machinery will be invented.

B．Because he believes atomic power will be the only sort of power.

C．Because he thinks coal will become important again.

D．Because he thinks the lecture was not to the point.

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Scientists do not understand why women should outlive men by five years.

A．正确

B．错误

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第3题

听力原文：U.S. scientists discovered that the soft orange glow of a common Caribbean coral

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According to the U.S. scientists, the bacteria giving the soft orange glow prevents the seawater from nourishing the coral.

A．正确

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第4题

听力原文：Why did scientists suggest the Iceman might ha killed as an offering to the gods？

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A．Because he died 5000 years ago in the mountain.

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C．Because he was killed in a fall while hunting animals.

D．Because his body was discovered in an area between two high mountains.

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第5题

听力原文：Whales--or their ancestors--were once land animals. Scientists believe that they

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Ages passed, and it became easier for these creatures to swim than to walk; millions of years later they were able to do without legs altogether. Now their hind legs had shrunk so that mere traces of them can be found under the skin when a whale is dissected.

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A．The largest sea creatures ever known.

B．Fish living in shallow waters.

C．Plant-eating land animals.

D．Meat-eating land animals.

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听力原文: Scientists at Brown University in the No...

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A．The inhibitor of the HIV transmission.

B．An effective way to deliver AIDS drugs.

C．A good strategy to prevent HIV transmission.

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第7题

听力原文：A Nobel Prize winner is selected to be the speaker of the opening ceremony. He is

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A．A Nobel Prize winner is scheduled to deliver the opening speech.

B．The speaker of the opening ceremony will discuss the Nobel Prize.

C．A Nobel Prize winner told us who the speaker would be.

D．The winners of the Nobel Prize will be posted in the opening ceremony.

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第8题

听力原文：Demand for specialized technical skills has long exceeded the supply of native-bo

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A．Supply of native-born scientists and engineers exceeded the demand.

B．Scientists and engineers in other countries have specialized technical skills.

C．Foreign scientists and engineers help to meet the domestic demand.

D．Supply of native-born scientists and engineers can meet the demand.

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第9题

听力原文：U.S. scientists discovered that the soft orange glow of a common Caribbean coral

comes not from the coral itself but from bacteria that live inside it. And the bacteria not only give the coral a little nightlight, but they also break down seawater to help nourish the coral.

According to the U.S. scientists, the bacteria giving the soft orange glow prevents the seawater from nourishing the coral.

A．正确

B．错误

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听力原文：Scientists are gearing up for one of the most ambitious international research pr

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A．10 years.

B．20 years.

C．30 years.

D．50 years.

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第11题

听力原文：With the development of science, scientists have discovered more about the world.

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A．Pollution of coastal areas.

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