题目内容
Bungling (笨手笨脚的) space organizations apart, the only mode of travel open to microbes seems to be meteorites (流星). Most of these are small bits of junk from the asteroid (小行星) belt that have gone off course. But some are rocks that have been flung into space from the surfaces of planets as a result of those planets having been struck by even larger bits of rock—decent-sized asteroids or comets.
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将文中所有的错词“声明科学”替换为“生命科学”：将标题段(“生命科学是中国发展的机遇”)设置为红色、三号、仿宋—CB2312、居中、加波浪线下划线。 (2)将正文各段落(“新华网北京……进一步研究和学习”)设置为首行缩进2字符，行距 18磅，段前间距1行。 (3)将正文第3段(“他认为……进一步研究和学习”)分为等宽的两栏、栏间距为2字符、栏间加分隔线，并以原文件名保存文档。
在IEEE 802参考模型中，MAC层实现______访问控制功能。
1 What are those of us who have chosen careers in science and engineering able to do about our current problems First, we can help destroy the false impression that science and engineering have caused the current world trouble. On the contrary, science and engineering have made vast contributions to better living for more people. Second, we can identify the many areas in which science and technology, more con siderably used, can be of great service in the future than in the past to improve the quality of life. While we can make many speeches, and pass many laws, the quality of our envi ronment will be improved only through better knowledge and better application of that knowledge. Third, we can recognize that much of the dissatisfaction we suffer today results from our very successes of former years. We have been so greatly successful in attaining material goals that we are deeply dissatisfied that we cannot attain other goals more rapidly. We have achieved a better life for most people, but we are unhappy that we have not spread it to all people. We have reduced many sources of environmental disasters, but we are unhap py that we have not conquered all of them. It is our raised expectations rather than our fail ures which now cause our distress. Granted that many of our current problems must be cured more by social, political, and economic instruments than science and technology, yet science and technology must still be the tools to make further advances in such things as clean air, clean water, better transportation, better medical care, more adequate welfare programs, purer food, con servation resources, and many other areas. According to the author, to improve the quality of environment, it is important to______.
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