B
It is natural that children are curious about the world around them. For example, they want to know how their hearts beat. They want to know why the ocean water tastes salty.
　　As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. They become interested in the physical world around them: the plants, the animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.
　　Scientists spend their lives trying to find out about the world．Those who work with the earth sciences study the earth, the oceans, and the skies. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry .
　　These scientists have already discovered a lot about our world．For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.
　　Of course, scientists cannot answer all of our questions. If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.
　　We know a lot about our world, but there are still many answers that we do not have, and we are curious.
45．According to the passage, which of the following statements is true?
　  A．People are curious in the same way.
　  B．People in different countries are interested in different things.
　  C．Men and women are curious about different things.
　  D．People of different ages are interested in different things
46．Scientists who work with the biological sciences study____.
A．the earth , the oceans and the sky          B．man-made things
C．plants and animals                               D．ocean water
47．When you run, your muscles need ____.
A．more nutrition and oxygen    B．more signals    C．more salt   D．water
48．A rock cracks _____.
A．in wet regions                                     B．in dry regions
C．at very high or very low temperatures               D．when salty water falls in

B

It is natural that children are curious about the world around them. For example, they want to know how their hearts beat. They want to know why the ocean water tastes salty.

　　As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. They become interested in the physical world around them: the plants, the animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.

　　Scientists spend their lives trying to find out about the world．Those who work with the earth sciences study the earth, the oceans, and the skies. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry .

　　These scientists have already discovered a lot about our world．For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.

　　Of course, scientists cannot answer all of our questions. If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.

　　We know a lot about our world, but there are still many answers that we do not have, and we are curious.

45．According to the passage, which of the following statements is true?

　  A．People are curious in the same way.

　  B．People in different countries are interested in different things.

　  C．Men and women are curious about different things.

　  D．People of different ages are interested in different things

46．Scientists who work with the biological sciences study____.

A．the earth , the oceans and the sky          B．man-made things

C．plants and animals                               D．ocean water

47．When you run, your muscles need ____.

A．more nutrition and oxygen    B．more signals    C．more salt   D．water

48．A rock cracks _____.

A．in wet regions                                     B．in dry regions

C．at very high or very low temperatures               D．when salty water falls in

It is natural that children are curious about the world around them. For example, they want to know how their hearts beat. They want to know why the ocean water tastes salty.

　　As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. They become interested in the physical world around them: the plants, the animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.

　　Scientists spend their lives trying to find out about the world．Those who work with the earth sciences study the earth, the oceans, and the skies. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry.

　　These scientists have already discovered a lot about our world．For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.

　　Of course, scientists cannot answer all of our questions. If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.

　　We know a lot about our world, but there are still many answers that we do not have, and we are curious.

1.According to the passage, which of the following statements is true?

　 A．People of different ages are interested in different things

　 B．People in different countries are interested in different things.

　 C．Men and women are curious about different things.

　 D．People are curious in the same way.

2.Scientists who work with the biological sciences study____.

    A．the earth , the oceans and the sky   B．plants and animals

    C．man-made things              D．ocean water

3.When you run, your muscles need ____.

A．more nutrition and oxygen    B．more signals    C．more salt   D．water

4.A rock cracks _____.

A．in wet regions                       B．in dry regions

C．at very high or very low temperatures   D．when salty water falls in

5.People are always curious because ____.

A．they cannot explain many things     B．they know nothing about the world

C．they know little about the world                             D．they want to be scientists

　Francis Bacon, one of the most important philosophers(哲人) of England, was born in London and educated at Cambridge University. When he was only 15, he went to France to work for the English ambassador (大使) . Two years later he went back to England to study law. At the age of twenty-three he was chosen to parliament (议会). His ideas about how scientists should study things in nature help to bring the modern way of thinking, called the scientific method.

　　One of the Bacon’s best-known books was his Essays. Each essay was a short piece of writing in which he tried to give a lesson by discussing sides of a subject such as studying, conversation, friends and healthy living. In many of his books, Bacon explained how scientists should study things as they really existed in nature and then tried to figure out what caused a particular thing to be as it was. Later, by doing experiments, the scientist could see that any one cause would always have the same result. This method, which is called inductive reasoning, is used by all the scientists today, but it was new in Bacon’s time.

5. According to the passage we know that ____.

　 A. Francis Bacon was the most important philosopher of England

　 B. Francis Bacon had good education

　C. Francis Bacon worked for a French ambassador at the age of 15

　　D. Francis Bacon stayed in France until he was 23

6. The underlined phrase “inductive reasoning” in the last paragraph means____.

　　A. to discover general laws from particular facts or examples

　　B. to reach a conclusion by reasoning from general laws to a particular case

　　C. to study things as they used to be

　　D. to study things in a particular way

7. Which of the following is NOT true?

　　A. Bacon was a learned man.

　　B. Bacon did a lot of philosophy.

　　C. The inductive reasoning was widely used both today and in Bacon’s time.

　　D. Bacon gave scientists much useful advice.

B
It is natural that children are curious (好奇的) about the world around them. For example, they want to know how their hearts beat. They want to know why the ocean water tastes salty.
　As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. They become interested in the physical world around them: the plants, the animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.
　Scientists spend their lives trying to find out about the world．Those who work with the earth sciences study the earth, the oceans, and the sky. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry .
　These scientists have already discovered a lot about our world．For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.
　Of course, scientists cannot answer all of our questions. If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.
　We know a lot about our world, but there are still many answers that we do not have, and we are curious.
55．According to the passage, which of the following statements is true?
　  A．People are curious in the same way.
　  B．People in different countries are interested in different things.
　  C．Men and women are curious about different things.
　  D．People of different ages are interested in different things
56．Scientists who work with the biological sciences study____.
A．the earth , the oceans and the sky   B．man-made things
C．plants and animals   D．ocean water
57．When you run, your muscles need ____.
A．more nutrition and oxygen  B．more signals   C．more salt  D．water
58．People are always curious because ____.
A．they cannot explain many things    B．they know nothing about the world
C．they know little about the world    D．they want to be scientists