更多"Human Space Exploration While scie"的相关试题:
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Human Space Exploration
While scientists are searching the cause of the Columbia disaster, NASA．is moving ahead with plans to develop a new craft that would replace shuttles (航天飞机) on space station missions by 2012 and respond quickly to space station emergencies.
The space agency released the first set of mission needs and requirements several days ago for the orbital space plane (轨道航天飞机), which would be designed to transport a crew of four to and from the International Space Station.Besides its main mission, the orbiter would also be used as
A．a medical research center. B．a space station.
C．a space ambulance. D．a passenger plane.
A. Although it includes few specifics, the plan states the orbiter (轨道航天飞机) will be safer, cheaper and require less preparation time than the shuttle. It would be able to transport four crew members by 2012—though it would be available for rescue missions by 2010. NASsays the craft should be able to transport injured or ill space station crew members to "definitive (决定性的) medical care" within 24 hours.
B. The release of the requirements showed NASremains focused on the long-term priorities of space exploration, even as questions exist concerning the loss of Columbia and its seven-member crew on February 1,2003.
[填空题]Should the U.S. halt human space flight
The Columbia accident has revived the debate on whether the rewards of
human space exploration are worth the risks.
No. I was a teacher when men first landed on the moon in 1969, and I remember how it moved my students and this country. (46) And we haven’t ventured outward since then. That’s 30 years too long! America’s human space-flight program is adrift, with no clear vision or goals beyond the completion of the International Space Station.
I want NASA to establish a phased series of goals over the next 20 years, including human visits to asteroids that cross the Earth’s orbit, establishing a research and living facility for humans on the moon, and human expeditions to the surface of Mars and its moons. (47) .
An astronaut is today’s Christopher Columbus, who sailed into the unknown and discovered the Americas. The knowledge we gain from having actua
[单项选择]Human fascination with space began hundreds of years ago. That interest has not waned, and today, the Hubble Telescope orbits 375 miles above Earth, working nonstop to unlock the secrets of the universe. The Hubble uses state-of-the-art instruments to provide amazing views of the universe that cannot be matched by ground-based telescopes. The reason for this is that, from the ground, we look at stars and other objects in space through Earth’s atmosphere. Our atmosphere is full of clouds, dust, and pollution, which cause everything we see to shimmer and shake. This effect creates difficulty for scientists on the ground to make steady, accurate measurements of objects moving in space. With assistance from the Hubble Telescope, astronomers can pinpoint the location of faraway stars and galaxies, and measure the speeds and distances of astronomical objects with far greater precision. Astronomers may even one day tell us exactly when the universe began.
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Prolonging Human Life
Prolonging human life has increased the size of the human population. Many people alive today would have died of childhood diseases if they had been born 100 years ago. Because more people live longer, there are more people around at any given time. In fact, it is a decrease in death rates, not an increase in birthrates, that has led to the population explosion.
Prolonging human life has also increased the dependency load. In all societies, people who are disabled or too young or too old to work are dependent on the rest of society to provide for them. In hunting and gathering cultures, old people who could not keep up might be left behind to die. In times of famine, infants might be allowed to die because they could not survive if their parents starved, whereas if the parents survived they could have another child. In most contemporary societies, people feel a moral obligation to keep people alive whether t
A. the industrial development
B. an increase in birthrates
C. cultural advances
D. a decrease in death rates
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Prolonging Human Life
Prolonging human life has increased the size of the human population. Many people alive today would have died of childhood diseases if they had been born 100 years ago. Because more people live longer, there are more people around at any given time. In fact, it is a decrease in death rates, not an increase in birthrates, that has led to the population explosion.
Prolonging human life has also increased the dependency load. In all societies, people who are disabled or too young or too old to work are dependent on the rest of society to provide for them. In hunting and gathering cultures, old people who could not keep up might be left behind to die. In times of famine, infants might be allowed to die because they could not survive if their parents starved, whereas if the parents survived they could have another child. In most contemporary societies, people feel a moral obligation to keep people alive whether they
A. the need to prolong the lives of old people
B. the need to enrich the life of the retired people
C. the need to build profit-making nursing homes
D. the need to take care of a sick and weak people
