题目内容
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[主观题]
The scientists say one effect of shark fishing has been an estimated ______ decrease in so
me shark populations.
A．9%
B．19%
C．90%
D．99%
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
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A．9%
B．19%
C．90%
D．99%
如果结果不匹配，请 联系老师 获取答案
更多“The scientists say one effect …”相关的问题
Scientists say that the salt in the ocean comes from______.
A．air
B．rocks
C．the earth
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A) since
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C) after
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A．Right
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A．The small spots of light.
B．Their chemical composition.
C．Their age.
D．Their size.
A.It hasn"t met scientists" expectation yet.
B.It hasn"t been appreciated appropriately.
C.It is secondary to what has been discovered.
D.It is what scientists have been aiming at.
听力原文： Some of the most interesting buildings in the world are the pyramids. Thousands of years ago in Egypt, kings built the pyramids. They used to build them as tombs. They thought pyramids would help them find life after death. They also wanted the world to remember them as important people. There are many pyramids along the Nile River. The largest is the pyramid of Khufu. It is made of 2,300,000 huge stones, most of which are higher than a person. It is about 144 meters high. To build this pyramid,100,000 men worked for twenty years.
The people of Mexico also built pyramids. They didn't build the pyramids for tombs. They used to build a pyramid and then build a temple on top of it. The pyramids of Mexico are not as high as those of Egypt, but they are big. Each pyramid has a stairway that goes from the bottom to the top. The biggest pyramid in Mexico is almost 2,000 years old. Scientist's think it took 10,000 men more than ten years to build. On top they built a temple to the sun. The temple is no longer there, but people call it the Pyramid of the Sun.
Scientists have studied the pyramids, but nobody can say just how the people of the ancient days built the pyramids and how they carried and lifted the huge stones. Each stone fits so well and they didn't have our modern machines Z.
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A．They built the pyramid in honor of the gods.
B．They built the pyramid as their tombs.
C．They wanted the world to remember them.
D．Both B and C.
听力原文： Scientists in many developing nations are studying a way to protect and control the use of forests, fishing water, grasslands and other resources. They call the system "common property". It means that people join together to abate and protect the resources. Scientists say that increased population is damaging the world resources. Too many trees are cut; grasslands and croplands are destroyed. Too many fish are taken from the fishing area. There are two traditional ways to deal with this situation. One is public: the government agency decides who may use the resources and when; or the property can be private: the owner decides how to protect the resources. Experts say these two methods often are not effective, however. They believe there is a third possibility that is neither completely governmental nor completely private. It is communal or joint control of the resources.
Scientists know that this idea of common property is not new. The system has been believed successful for a long time by groups in many countries. In South Asia, some villagers have governing systems to protect everyone's right to irrigation water. In part of Central Africa, there are traditional rules that banned the killing of some wild animals. Farmers in Syria have a system to share grasslands and fisherman in Turkey have a system to make sure no one takes too many fish. Scientists say such systems usually were developed by small groups to deal with limited problems. Rules are simple and the enforcement is based on traditional value and ways of doing things. Scientists believe such systems also would be effective in other situations. They are studying how it might produce more cooking rules for people in Indian villages. The scientific group in Costa Rice is studying common property to control land area. And a government group in Zimbabwe is studying the system to protect wild animals. Scientists do not say the common property system will solve all resource needs in developing nations, buy they believe it provides one important way to deal with the problem.
(33)
A．Property owned by a group of people.
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Scientists say they've made a cool discovery about living longer.
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听力原文： Experts on dyslexia say that the problem is not a disease. They say that persons with dyslexia use information in a different way. One of the world's greatest thinkers and scientists named Albert Einstein was dyslexic. Dr Einstein said that he never thought in words the way that most of us do. He said that he thought in pictures instead. Other famous people who suffered from dyslexia include Leonardo Da Vinci, a celebrated Roman artist, Thomas Edison, a well-Known American inventor and a former American Vice president, Nelson Rockfeller.
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A．The left-handed women.
B．The left-handed men.
C．Excellent female scientists or artists.
D．Some celebrated female presidents.
