We must __________ that the experiment is con...

We must __________ that the experiment is controlled as rigidly as possible.

高三英语单项填空中等难度题查看答案及解析

In space, there is no up or down. Without the gravity that we experience on Earth, as-tronauts and everything else on a spaceship float freely.

Humans can experience the sense of zero gravity without going into space. How？A zero-gravity flight. When an airplane flies in a lot of parabolas（抛物线）, a man-made zero-gravity environment is set up. Everything in the plane floats, even passengers.

Gravity has an effect on everything from the human body and mind to the behavior of plants and the way machines run. Space travel is expensive and dangerous. But zero-gravity flights let scientists conduct experiments in an environment that mimics（模拟） the conditions of space. On each of its research trip, Zero-G flies about 30 parabolas, each of which creates a period of weightlessness that lasts about 30 seconds. Nikolaus Kuhn of the University of Ba-sel, in Switzerland, flew with Zero-G. He was conducting an experiment about soil and the flow of water on Mars. The Red Planet has about one-third of the gravity that Earth has. This means water flows more slowly on Mars. By making the parabolas less steep, zero-gravity flights can make the feeling of Martian gravity. Flying with Zero-G has been necessary for Kuhn’s research. “It is the only chance, other than going to Mars, to mimic movement of water as it would be on Mars,” he told TFK.

For years, NASA used zero-gravity flights to prepare and train astronauts. “I have not been to space,” Peters of Zero-G says, “But I have been told by astronauts that zero-gravity feels exactly the same.” As humans continue to explore the universe beyond Planet Earth, zero-gravity flights will remain an important and fun tool. “It never gets old,” Peters says “I would do it every weekend for the rest of my life if I could.”

1.Why do scientists set up man-made zero-gravity environment？

A.To study the water on the earth.

B.To offer weightlessness as a business.

C.To take scientists to any other planets.

D.To mimic the condition of space for experiments.

2.How much time of weightlessness can a Zero-G light offer？

A.About 30 seconds. B.About 90 seconds.

C.About 15 minutes. D.About 30 minutes.

3.What feature do the parabolas in Zero-G flights have？

A.The gentler parabolas are, the more satisfied the researchers are.

B.The steeper parabolas are, the less weight the passengers feel.

C.The steeper parabolas are, the more successful the experiments are.

D.The gentler parabolas are, the more quickly water on Mars flows.

4.What can be inferred about the Zero-G flight from the text？

A.It is useless for training astronauts.

B.It has no side effect on human body.

C.It creates a substitutable environment of zero gravity in space.

D.It is cheaper but more dangerous than space travel.

高三英语阅读理解中等难度题查看答案及解析

Environmental health is defined as the control of the factors (因素) in the environment that may have harmful effects on people’s physical, mental, or social well-being (安乐). Because natural disasters expose people to danger by bringing up or threatening their immediate environment, effective management of environmental health after a natural disaster is of great importance.

The environmental health measures that must be considered after a natural disaster include the supply of appropriate shelter for individuals or groups of people left homeless, the distribution (分配) of safe and accessible water, and the protection and distribution of safe food products and so on.

To effectively manage environmental health during and after a disaster, it is important that a state of preparation is in effect before the event actually occurs. During an emergency, success largely depends on making good, rapid judgment and appropriate response measures. High-level decision makers, therefore, must be familiar with sound measures beforehand and should be given an accurate judgment of the disaster’s specific effects as quickly as possible.

This book is intended to serve as a guide for those who may be called upon to make emergency decisions after disaster strikes. The recommended environmental health measures have been listed in the order of priority in which they should be taken during an emergency. However, each natural disaster is unique in the degree or type of emergency. In response to any given disaster, decision makers may find it necessary to change the priority assigned to any particular measure.

1.The first paragraph is mainly to _____.

2.In order to effectively cope with the emergency, the most important is that _____.

3.We can’t do just as the recommended environmental health measures because _____.

4.The best title of this passage should be _____.

高三英语阅读理解中等难度题查看答案及解析

Keep yourself open 　　　 we can experience the great joy that friendship can bring.

A. as if　　　　　　　　 　　　　　　　　　 B. so that　　　　　　　　 　　　　　　　　　 C. even though　　　　　　　　　 　　　　　　　　　 　D. ever since

高三英语单项填空简单题查看答案及解析

He pointed out such a crucial detail about the experiment ______ we could never neglect.

A.as B.that C.where D.when

高三英语单项填空中等难度题查看答案及解析

The result of the experiment was very good, ___________　we hadn’t expected.

A. as           B. that         C. which          D. what

高三英语单项填空简单题查看答案及解析

For many, music is as important to the human experience as eating and breathing. We hear music everywhere—at home, the gym, parties and stores. But what kind of music do we prefer to listen to, and when and why do our musical preferences change?

The relationship between the change of seasons and musical preferences was the focus of a study led by psychologist Terry Pettijohn. He and his team based their research on a previous study that examined the relationship between popular music preferences and the Environmental Security Hypothesis(假设). The results showed that over time, when social and financial conditions were more risky, the songs of the year that were slower, longer, more comforting and serious were most popular. And during periods in which social and financial conditions were generally stable, the result was opposite.

Building on these findings, Pettijohn and his team wondered if the Hypothesis could also be applied to the change of seasons. For college students, the participants in this study, autumn begins at the start of the school year. Gone are the carefree days of summer, when school is out. Winter means colder temperatures, shorter days, and, in many places in the country, snow. Spring, however, is a different story. It represents a fresh start and when clocks spring forward, we gain an extra hour of daylight. As students walk into summer, they’re absorbed in the sunshine and social activities—and enjoy a break from school.

But do changing seasonal conditions influence musical preferences? To answer this question, the researchers designed two studies. What did they find? Both groups of college students favored more serious music during the seasons of fall and winter, and more active and energetic music during the spring and summer seasons. And these findings, Pettijohn argues, have practical significances.

1.The purpose of the question raised in Paragraph 1 is to ________.

A. present a different opinion on music

B. prove where to listen to music matters

C. stress the importance of music to humans

D. introduce the topic on musical preferences

2.What influences a person’s choice of music types according to the previous study?

A. Whether one has enough free time.

B. Whether one lives in a stable situation.

C. Whether one is exposed to sunlight.

D. Whether one chooses to change his life.

3.What does Paragraph 3 imply?

A. Students aren’t fond of school in any season.

B. Spring has a special meaning to people.

C. The Hypothesis disagrees with Pettijohn’s studies.

D. The length of summer time is longer than that of winter time.

4.How does Pettijohn feel about the findings of his studies?

A. It’s unexpected.　　 B. It’s humorous.

C. It’s discouraging.　　 D. It’s significant.

高三英语阅读理解中等难度题查看答案及解析

__________ is known to everybody, Taiwan is a part of China. We must unify it.

A. It       B. As        C. That       D. What

高三英语单项填空中等难度题查看答案及解析

We hope that as many people as-possible _____ join us for the picnic tomorrow.

A. need      B. must         C.should         D. can

高三英语单项填空中等难度题查看答案及解析

It is the experience he had as a boy ______ has formed his present personality.

高三英语单项填空简单题查看答案及解析