正常付汇的信用证业务档案保存（）年之后可予以销毁.A、1 B、3 C、5 D、10

2002年某医院住院病人中肺癌患者占15%，该15%是（）

A.率

B.构成比

C.相对比

D.平均数

E.中位数

森林医生——啄木鸟

一个医生嘴巴尖，天天出诊到林间；

敲敲听听多仔细，要动手术把头点。

上面这个谜语猜一种动物，谜底是啄木鸟。可是起初我不但猜不中，而且人家揭了谜底后，我还不懂为什么把啄木鸟誉为“森林医生”。后来我随一支森林科学考察队去林区调查研究，通过一位生物学家对啄木鸟的介绍，和我自己对它的观察，我才真正认识到，“森林医生”这个称号，啄木鸟是当之无愧的。

啄木鸟每天都起得很早，起身后第一件事就是给树木“检查身体”。它用嘴将一棵棵树从根到梢笃笃地轻轻敲打一通，听听有没有空声。经验告诉它，敲打时如发出空声，树干里面一定有虫，就立刻“动手术”。它的嘴长而直，末端尖锐，不但能啄破树皮和腐败的树干，而且能啄开坚硬的木质部；它的舌骨很发达，色围着头骨，舌骨起着特殊的弹簧作用，能使细长的舌条伸缩自如；舌面富含黏液，能把树中昆虫的幼虫和虫卵粘住；舌端生有向后倒长的小钩，能钩取树中较大的昆虫。它的鼻孔上覆盖着保护性的刚毛，可以防止碎木屑飞入鼻孔。值得一提的是，它的操作路线也很科学，工作时总是围绕着树干螺旋式地向上攀登，这样既可避免重复劳动，又不会有所遗漏。啄木鸟就凭着这套完备的“医疗器材”和独特的“医术”，专门捕食危害树木的昆虫，保护树木健康地成长。

由于长期过着树栖生活，啄木鸟的翼变得既短又钝，不适于快飞和远翔，只能在林间通道或林中旷地作短距离滑翔，但是它的足趾却特别强劲有力，趾的排列也不像一般鸟类那样三趾向前，一趾向后，而变成二趾向前，二趾向后，而且具有锐利的钩爪，因此即使攀缘在笔直的树干上也不会滑落下来。此外，它的尾羽强韧坚直，羽轴特别粗硬，有弹性，可以当做支柱顶住身体，与两条岔开的腿形成一个“三足鼎立”之势，增加了悬立时的稳固性。

小题1:如果把本文的题目改为“啄木鸟”好不好，为什么？（3分）

小题2:文章开头引用谜语有什么作用？（3分）

小题3:为什么说啄木鸟的“操作路线也很科学”？ （3分）

小题4:文中画横线句子运用了哪种说明方法？有什么作用？（4分）

I don’t really like the author,_______ I have to admit his books are very exciting.

A．although

B．unless

C．until

D．once

祛风湿药中，能补肝肾，强筋骨的药是________、________。

Today’s generation of young people is the largest in human history. Nearly half the world’s population — more than 3 billion people — are under the age of 25. More than half the world’s young people — about 850 million between the ages of 10 and 24 — live in Asia and the Pacific region.

This rapidly expanding youth population is increasingly vulnerable to HIV.  Young people are at the center of the HIV/AIDS epidemic . Of the 10 million young people living with HIV worldwide, 21% live in Asia and the Pacific region. When surveying of all new HIV/AIDS cases globally, nearly a quarter of all people living with HIV/AIDS are under the age of 25. An estimated 6,000 young people are infected every day — one every 14 minutes. The majority are women and girls. In South Asia, where over 1 million young people between the ages of 15 to 24 are infected with HIV, more than half (62%) are young women.

Young people are key to defeating the HIV/AIDS epidemic. Yet in most countries, they lack the information, education and services that will enable them to make informed and healthy choices about their health, and the needs of youths are often ignored. UNESCO, in collaboration with other UN agencies, governments, NGOs and community-based organizations, makes efforts to ensure the health needs of youths, including HIV prevention education, programs and policies implemented throughout Asia and the Pacific region.

59. How many young people with HIV live in Asia and the Pacific area?

A. 3 billion               B. 850 million        C. 100 million           D. 2.1 million

60. Which of the following statements is NOT true?

A. It’s young people themselves that can defeat HIV.

B. Most cases infected with HIV are young people.

C. Most young people who are infected with HIV are women.

D. Half of the world population is infected with HIV.

61. From the passage we can conclude that ________.

A. more and more young people will be infected with HIV

B. it’s because of not being informed that young people are easy to be infected

C. people in Asia and the Pacific region are easy to be infected

D. there is no policy for teenagers’ prevention of HIV