建设工程职业健康安全与环境问题在建设项目的（）。A．各个阶段都应重视 B．前期策划阶

脂瘤独有的特征是

A．数目不等，大小不一，肿形如馒，推之可移
B．青筋垒垒，盘曲成团，质地柔软，表面青蓝
C．瘤中心有粗大毛囊孔，可挤出臭味脂浆
D．瘤体单发，质地硬韧，界限清楚，推之可移
E．瘤体深隐，质地坚硬，境界清楚，推之不移

阅读理解

     American teens are setting an example for their parents through their volunteer work, according to

the Harris Interactive poll conducted in the United States between Jan.29 and Feb.2 among 2,003 adults.

The random national telephone survey released this week by the Federal Waybased charity World Vision

found that more teens volunteer to support a charitable (慈善的) cause-56 percent-than have a parttime

job-39 percent.

     Parents and guardians said 82 percent of the teens in their lives do something to support charitable

causes, including volunteering, recruiting others to a cause, wearing a Tshirt or donating money.Fortysix

percent of the adults surveyed said they volunteered their time and they also inspired their children to

volunteer.

Sara Johnson, a teacher who advises students at a private school in a Chicago suburb, says she's seen a

rise of teen involvement in social causes since President Barack Obama was elected in November.

     The Harris Interactive survey found a quarter of teens have become more involved in charitable

causes or organizations as a result of the economic downturn, but the economy has also led to cuts in

allowances, and has teens work more hours at a paying job.

     Alynn Woodson, director of volunteer engagement at Habitat for Humanity International, said she has

noticed a new enthusiasm among teen volunteers for the organization.

     Habitat for Humanity International celebrates the 20th anniversary of its alternative spring break

program this year and is expecting more than 12,000 young people to help build homes for lowincome

people around the nation.

1. The following statements about the teens' voluntary work are true EXCEPT________.

A. the economic downturn led teens to work less hours at paying jobs

B. the poll was done at the end of January and the early February

C. children do more voluntary work than their parents

D. more teens are involved in charitable causes or organizations

2. We can infer from the passage that________.

A. parents and guardians encourage their children to do voluntary work

B. volunteers all wear Tshirts while doing charity work

C. more teens are doing paying jobs as a result of the economic downturn

D. less teens were enthusiastic about voluntary work before Obama came into power

3. The author mentioned Habitat for Humanity International in order to prove________.

A. that homes for lowincome people will be built around the nation

B. Alynn Woodson is the director of volunteer engagement

C. more young people are doing volunteer work

D. it's 20 years since Habitat for Humanity International came into being

4. Which of the following is the best title of the passage?

A. More teens doing voluntary work

B. Teens setting examples for parents in charitable causes

C. Comments on teens' voluntary work

D. The 20th anniversary of Habitat for Humanity International

（）的是一组将输入转化为输出的相互关联或相互作用的活动。

A．过程

B．系统

C．组织

D．工作

汗证实证的病机多为

A．饮食不节
B．风热外感
C．阳明热炽
D．营卫失调
E．湿热迫蒸

Science is a dominant theme in our culture. Since it touches almost every facet of our life, educated people need at least some acquaintance with its structure and operation. They should also have an understanding of the subculture in which scientists live and the kinds of people they are. An understanding of general characteristics of science as well as specific scientific concepts is easier to attain if one knows something about the things that excite and frustrate the scientist.
This book is written for the intelligent student or lay person whose acquaintance with science is superficial, for the person who has been presented with science as a musty storehouse of dried facts, for the person who sees the chief objective of science as the production of gadgets, and for the person who views the scientists as some sort of magician. The book can be used to supplement a course in any science, to accompany any course that attempts to give an understanding of the modern work, or--independently of any course --simply to provide a better understanding of science. We hope this book will lead readers to a broader perspective on scientific attitudes and a more realistic view of what science is, who scientists are, and what they do. It will give them an awareness and understanding of the relationship between science and our culture and an appreciation of the roles science may play in our culture. In addition, readers may learn to appreciate the relationship between scientific views and some of the values and philosophies that are pervasive in our culture.
We have tried to present in this book an accurate and up-to-date picture of the scientific community and the people who populate it. That population has in recent years come to comprise more and more women. This increasing role of women in the scientific subculture is not a unique incident but, rather, part of the trend evident in all segments of society as more women enter traditionally male-dominated fields and make significant contributions. In discussing these changes and contribution, however, we are faced with a language that is implicitly sexist, one that uses male nouns or pronouns in referring to unspecified individuals. To offset this built-in bias, we have adopted the policy of using plural nouns and pronouns whenever possible and, when absolutely necessary, alternating he and she. This policy is far from being ideal, but it is at least an acknowledgment of the inadequacy of our language in treating half of the human race equally.
We have also tried to make the book entertaining as well as informative. Our approach is usually informal. We feel, as do many other scientists, that we shouldn’t take ourselves too seriously. As the reader may observe, we see science as a delightful pastime rather than as a grim and dreary way to earn a living.

This passage most probably is ______.

A. a book review



B. the preface of a book
C. the postscript of a book

D. the concluding part of a book