Life in the future（Period 4　Reading and Writing）

reference for teaching

space program in the future

教學資源，完全免費，無須注冊，天天更新！" type="#_x0000_t75">the risk takers and visionaries of this agency have expanded human knowledge, have revolutionized our understanding of the universe, and produced technological advances that have benefited all of humanity.inspired by all that has come before, and guided by clear objectives, today they set a new course for america’s space program.they will give nasa a new focus and vision for future exploration.they will build new ships to carry man forward into the universe, to gain a new foothold on the moon, and to prepare for new journeys to worlds beyond their own.their current programs and vehicles for exploring space have brought them far.the space shuttle has flown more than a hundred missions.it has been used to conduct important research and to increase the sum of human knowledge.shuttle crews, and the scientists and engineers who support them, have helped to build the international space station.��telescopes—including those in space—have revealed more than 100 planets in the last decade alone.probes have shown them stunning images of the rings of saturn and the outer planets of our solar system.robotic explorers have found evidence of water—a key ingredient for life—on mars and on the moons of jupiter.at this very hour, the mars exploration rover spirit is searching for evidence of life beyond the earth.��it is time for america to take the next steps.their first goal is to complete the international space station by .they will focus their future research aboard the station on the long-term effects of space travel on human biology.the environment of space is hostile to human beings.radiation and weightlessness pose dangers to human health, and we have much to learn about their long-term effects before human crews can venture through the vast voids of space for months at a time.research on board the station and here on earth will help us better understand and overcome the obstacles that limit exploration.through these efforts we will develop the skills and techniques necessary to sustain further space exploration.the second goal is to develop and test a new spacecraft, the crew exploration vehicle, by , and to conduct the first manned mission no later than .the crew exploration vehicle will be capable of ferrying astronauts and scientists to the space station after the shuttle is retired.but the main purpose of this spacecraft will be to carry astronauts beyond our orbit to other worlds.this will be the first spacecraft of its kind since the apollo command module.