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The scientist's work was based on______.
A．occasional observations
B．systematic observations
C．observations of several nests
D．observations of an undisturbed nest
答案
更多“The scientist's work was based on______.A．occasional observationsB．systematic observations”相关的问题
第1题
A．made for
B．set out
C．took off
D．turned up
第2题
Which of the following best describes the interviewees feeling towards being a scientist？
A．It takes too many years to finish the training.
B．There"s a certain pattern on how to become a scientist.
C．Everyday lab work is routine and boring.
D．It is harder to make a living.
第3题
They could see there was something wrong with both watches. They observed them for several hours before speaking to each other. They both silently found that the German watch was losing 60 minutes and the Japanese are doubled that.
The scientist with the Japanese watch then slowly raised his head and said," Both watch are out of work, but my watch is right more often than yours, so it's better. "The scientist German watch went home without saying a word.
The two scientists were quarrelling at the beginning of the story, because __________.
A．the Japanese watch was better
B．the German watch was better
C．each of them thought his own watch was better than the other's
D．both the watches were wrong
第4题
They could see there was something wrong with both watches. They observed them for several hours before speaking to each other. They both silently found that the German watch was losing 60 minutes and the Japanese are doubled that.
The scientist with the Japanese watch then slowly raised his head and said, "Both watch are out of work, but my watch is right more often than yours, so it's better." The scientist with the German watch went home without saying a word.
The two scientists were quarrelling at the beginning of the story, because ______.
A．the Japanese watch was better
B．the German watch was better
C．each of them thought his own watch was better than the other's
D．both the watches were wrong
第5题
听力原文： Robert Goddard, American physicist and rocket scientist, once said that the dream of yesterday is the hope of today and the reality of tomorrow. It was his scientific work that gave hope to many of our dreams about space and then turned them into reality.
Robert Goddard's many studies and tests in the early 1900s led to the first rocket. Then he developed rockets with more than one engine. Each engine pushed the rocket higher and higher out of Earth's atmosphere. His ideas are still used today.So, in a way, every rocket that flies today is a Goddard rocket.
Robert Goddard was far ahead of his time. He developed and flew many rockets that got their power from solid fuels. Then, in 1925, he made and tested the first rocket engine using a soft chemical fuel. In 1926, he successfully fired the world's first liquid-fuel rocket.
Robert Goddard died in 1945 of cancer. He was sixty-three years old. He received a special honor many years after his death. In 1959, the United States established the Goddard Space Flight Center near Washington, D.C. The Goddard Space Flight Center honors the man whose work proved that machines could travel out of Earth's atmosphere, into space.
(23)
A．An airplane designer.
B．A science fiction writer.
C．The inventor of rockets.
D．A famous theoretical physicist.
第6题
The scientist's knowledge must be exact.There is no room for half right or right just half the time.He must be as nearly right as the conditions permit.What works under one set of conditions at one time must work under the same conditions at other times.If the conditions are different,any changes the scientist observes in a demonstration must be explained by the changes in the conditions.This is one reason that investigations are important in science.Albert Einstein,who developed the theory of relativity,arrived at this theory through mathematics.The accuracy of this mathematics was later tested through investigations,Einstein's ideas were shown to be correct.A scientist uses many tools for measurements.Then the measurements are used to make mathematical calculations that may test his investigations.
1.What makes a scientist according to the passage?（）
A.The tools he uses.
B.The way he uses his tools.
C.His ways of learning.
D.The various tools he uses.
2.The underlined part in the passage shows（）.
A.the importance of information
B.the importance of thinking
C.the difference between scientists and ordinary people
D.the difference between carpenters and people with other jobs
3.A sound scientific theory should be one that （）.
A.works not only under one set of conditions at one time,but also under the same conditions at other times
B.does not allow any changes even under different conditions
C.can be used for many purposes
D.leave no room for improvement
4.The author quotes the case of Albert Einstein to illustrate（）.
A.that measurements are keys to success m science
B.that accuracy of mathematics
C.that investigations are important science
D.that the mathematical calculations may test his investigations
5.What is the main idea of the passage?（）
A.The theory of relativity.
B.Exactness is the core of science.
C.Scientists are different from ordinary people.
D.Exactness and ways of using tools are the keys to the making of a scientist.
第7题
"Resumes arrive with stains. Some candidates don't bother to spell the company's things at the 【C3】______ of something larger they work toward." " 【C4】______ from losing the forest for the trees," says Charles Garfield, associate professor at the University of California, San Francisco, "we must 【C5】______ ask ourselves how the details we're working on fit into the larger picture they don't, we should drop them and move to something else." Garfield 【C6】______ this process to his work as a computer scientist at NASA. "The Apollo II moon launch was slightly off-course 90 percent of the time," says Garfield. "But a successful landing was still likely because we knew the exact coordinates of our goal. This allowed us to make adjustments as necessary." 【C7】______ where we want to go helps us judge the importance of every task we undertake.
Too often we believe what 【C8】______ others' success is some special secret or a lucky break(机遇). But rarely is success so mysterious. Again and again, we see that by doing 【C9】______ things within our grasp well, large 【C10】______ follow.
【C1】______
A．will
B．would
C．shall
D．should
第8题
The example given in the third paragraph illustrates how______.
A．applied scientist direct the work of the pure scientist
B．applied science suggests problems for the basic scientist
C．pure scientist operates independently of applied scientist
D．pure scientist plays a more important role than applied scientist
第9题
Unlocking the Human Genome(基因组)
1 A project to unlock secrets-what scientist could resist that challenge？ This is what many scientists are doing as they work on the Human Genome Project. The aim of the project is to decode(破译)all of the some 100, 000 genes in the human body. Scientists are using DNA fingerprinting techniques to do the decoding.
2 DNA is the substance found in the chromosomes(染色体)of a cell. A chromosome is a chain of genes. Each gene carries a piece of genetic information. At any one moment in a cell, thousands of genes are turned on and off to produce proteins(蛋白质). The challenge for scientists is to find out what role each gene plays in protein production. At some point this decoding will be complete. Then scientists will have a map of an ideal genome, or a picture of the total genetic nature of a human being. The ideal genome is called a consensus(交感)genome. Everything works well in a consensus genome.
3 But no one in the world has a consensus genome. Everyone's genome is different from the ideal. These differences are referred to as genetic mutations(突变). Genetic mutations in a person's genome mean that the person has a greater than average chance of suffering from health problems. Some problems are not life-threatening. These would include things like colorblindness, or mild headaches. Other problems are serious, such as heart disease, or cancer.
4 It will take years to identify the role of each of the 100, 000 genes, The short-term goal of the project is to find the physical and mental health problems a person is likely to encounter during his or her lifetime. The long-term goal is to have each person live a longer, healthier life.
A. How does DNA work？
B. What is the Human Genome Project about？
C. How are the DNA samples collected？
D. What are the goals of the Human Genome Project？
E. What is the role of each gene？
F. What are the consequences of genetic mutations？
Paragraph 1 ______
第10题
A noted scientist, Ellsworth Huntington, concluded from other men's work and his own among people that different climate and temperature have a definite effect on our mental abilities.
He found that cool weather is much more favorable for creative thinking than is summer heat. This does not mean that all people are less intelligent in summer than they are during the rest of the year. It does mean, however, that the mental abilities of large numbers of people tend to be lowest in summer.
Spring appears to be the best period of the year for thinking. One reason may be that in the spring man's mental abilities are affected by the same factors that bring about great changes in all nature.
Fall is the next best season, then winter. As for summer, it seems to be a good time to take a long vacation from thinking.
(30)
A．Seasonal variations in nature.
B．How intelligence changes with the change of seasons.
C．How we can improve our intelligence.
D．Why summer is the best season for vacation.
