题目

下列物质的鉴别方法错误的是                                       （    ）  A.用水鉴别氢氧化钠和硝酸铵固体  B.用带火星的小木条验证空气和氧气  C.用小木条鉴别浓硫酸和稀硫酸    D.用燃着的小木条鉴别二氧化碳和氮气 答案：C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。AA NATIONWIDE BESTSELLERIt’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 Zinn56. On the whole, 1491 is a book mainly about America’s_______ .A. life-styles       B. population       C. history         D. agriculture57. 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 relatedC. 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 1492B. North Americans were the tallest in the 18th century in the worldC. Mesoamerican farmers knew genetic engineering 5,000 years agoD. the population in the Americas was smaller than that in Europe in 1492