问题 选择题

2012年5月31日是第25个世界无烟日,吸烟的危害不包括(  )

A.可能诱发肺癌

B.不会影响他人健康

C.会污染室内空气

D.易诱发多种呼吸系统疾病

答案

据分析,吸烟时产生烟雾里有40多种致癌物质,还有十多种会促进癌发展的物质,其中对人体危害最大的是尼古丁、一氧化碳、焦油和多种其它金属化合物.一支烟所含的尼古丁就足以杀死一只小白鼠.香烟烟雾中大量的一氧化碳同血红蛋白的结合能力比氧大240-300倍,严重地削弱了红细胞的携氧能力,因此,吸烟使血液凝结加快,容易引起心肌梗塞、中风、心肌缺氧等心血管疾病.更为严重的是,吸烟者还严重妨碍他人健康.研究结果表明,吸烟者吸烟时对旁人的危害比对他自己还大. 

 故选:B

单项选择题

Education is one of the key words of our time. A man, without an education, many of us believe, is an unfortunate victim of unfortunate circumstances deprived of one of the greatest twentieth-century opportunities. Convinced of the importance of education, modern states "invest" in institutions of learning to get back "interest" in the form of a large group of enlightened young men and women who are potential leaders. Education, with its cycles of instruction so carefully worked out, is punctuated by textbooks--those purchasable wells of wisdom--what would civilization be like without its benefits

So much is certain: that we would have doctors and preachers, lawyers and defendants, marriages and births; but our spiritual outlook would be different. We would lay less stress on "facts and figures" and more on a good memory, on applied psychology, and on the capacity of a man to get along with his fellow-citizens. If our educational system were fashioned after its bookless past we would have the most democratic form of "college" imaginable. Among the people whom we like to call savages all knowledge inherited by tradition is shared by all; it is taught to every member of the tribe so that in this respect everybody is equally equipped for life.

It is the ideal condition of the "equal start" which only our most progressive forms of modern education try to reach again. In primitive cultures the obligation to seek and to receive the traditional instruction is binding on all. There are no "illiterates"--if the term can be applied to peoples without a script--while our own compulsory school attendance became law in Germany in 1642, in France in 1806, and in England 1976, and is still non-existent in a number of "civilized" nations. This shows how long it was before we considered it necessary to make sure that all our children could share in the knowledge accumulated by the "happy few" during the past centuries. Education in the wilderness is not a matter of monetary means. All are entitled to an equal start. There is none of the hurry that, in our society, often hampers the full development of a growing personality. There, a child grows up under the ever-present attention of his parents; therefore the jungles and the savages know of no "juvenile delinquency". No necessity of making a living away from home results in neglect of children, and no father is confronted with his inability to "buy" an education for his child.

Notes: juvenile delinquency 青少年犯罪。

The best title for this text is()

A. The Significance of Education

B. Educational Investment and Its Profit

C. Education and Modern Civilization

D. Education: A Comparison of Its Past and Its Present

问答题 简答题