As children grow up, they bee 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. The they bee interested in the physical world around them: the plants, the
animals, the sky. Later, they bee 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 es 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.
【小题1】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【小题2】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【小题3】When you run, your muscles need .A．more nutrition and oxygenB．more signalsC．more saltD．waterD
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(答案→)D
解析：人人都有好奇心,无论是小孩还是成人,这是这篇议论文的论点。文章还通过具体事例说明了就是因为好奇心,人类科学才得以发展。
【小题1】本题为正误判断题。根据文章第二段的描述,人处于不同的年龄阶段,所好奇的对象也随之而不同,因此选D 比较恰当。
【小题2】细节理解题。文章第三段第二句有如下文: Other scientists who study living things work with the biological sciences.其中 living things(生物)等同于 plants and animals,故选C。
【小题3】细节题。文章第四段几处都有交待your muscles work very hard and use the nutritionThe muscles need oxygen, too ...The signal means that the muscles need more nutrition and oxygen.,因此选A。