在干燥洁净的空气中，体积分数约为21%的是 A．氧气 B．氮气 C．二氧化碳 D

读“某我国某地区图”，回答问题。

小题1:有关甲地区的叙述，正确的是

①以干旱为主的自然特征 

②河流较少，多为内流河 

③具有丰富的太阳能资源  

④很多山峰终年积雪，冰川广布

A．①②

B．③④

C．①④

D．②③小题2:乙山地一线是我国重要的地理分界线，下列各线与其分布大体相一致的是

①种植业与畜牧业分界线

②七月平均0℃等温线

③亚热带与暖温带分界线

④地势第二阶梯与第三阶梯分界线

⑤800毫米等降水量线⑥水田与早地的界线

A．②③⑤

B．③⑤⑥

C．①④⑥

D．①②④

第三部分阅读理解（共15小题，每小题2分，共30分。）

阅读下列短文，从每题中的A、B、C、D四个选项中，选出最佳答案。

A NATIONWIDE BESTSELLER

It’s likely that everything you learned about America’s ancient history is wrong.

The new book, 1491, completely changes our understanding of the Americas before the arrival of Columbus in 1492.

DID YOU KNOW?

When Columbus landed there were probably more people in the Americas than there were in Europe.

The peoples of North America had such healthy life-styles that as late as the 19th century they continued to be the tallest people on earth.

Facts have shown that the Americas were populated as long as 33,000 years ago.

4,000 years ago Mesoamerican farmers developed corn in a feat (技艺) of genetic engineering that still isn’t completely understood.

COMMENTS ON 1491

“In the tradition of Jared Diamond & John McPhee, a totally new view of pie-Columbian America”                                                    --Richard Rhodes

“Attractively written and really absorbing ... Charles C. Mann has produced a book that’s part detective story, part epic (史诗) and part tragedy. He has taken on a vast topic: thousands of years, two huge continents, and cultures.”

-- Charles Matthews, San Jose Mercury News

“Powerful and challenging”

--Alan Taylor, Washington Post

“A pleasure to read as well as a wonderful education”              -- Howard Zinn

56. On the whole, 1491 is a book mainly about America’s_______ .

A. life-styles       B. population       C. history         D. agriculture

57. Which of the following is NOT TRUE about the comments on the book 1491 ?

A. It is interesting and instructive.        B. It is attractive and culturally related

C. It is challenging and revolutionary.     D. It is humorous and persuasive.

58. From this passage, we can learn______ .

A. people settled in the Americas a little earlier than 1492

B. North Americans were the tallest in the 18th century in the world

C. Mesoamerican farmers knew genetic engineering 5,000 years ago

D. the population in the Americas was smaller than that in Europe in 1492

下列关于护理道德本质的描述不正确的是（）。

A.护理道德是一种社会意识形态

B.护理科学发展的快慢对护理道德影响不大

C.护理道德是一种职业道德

D.护理道德受一定的社会经济关系的制约

E.护理道德受社会道德的制约

通过Internet发送或接收电子邮件（E-mail）的首要条件是应该有一个电子邮件（E-mail）地址，它的正确形式是（）

A、用户名@域名

B、用户名#域名

C、用户名/域名

D、用户名.域名

骨嗜酸性肉芽肿的基本X线改变有（）

A.好发于颅骨、长骨、脊柱

B.骨质溶骨性破坏

C.可有骨膜增生

D.晚期病灶可有重新骨化消失

E.常见"悬浮齿"