问题 选择题

某同学对所学部分化学知识归纳如下,其中有错误的一组是                         (   )

A物质性质与用途B安全常识
N2性质稳定———填充在食品袋防腐

乙醇具有可燃性———用作燃料

CO 具有还原性———冶炼金属

假酒中毒———由甲醇引起

假盐中毒———由黄曲霉毒素引起

瓦斯爆炸———由天然气引起

C元素与人体健康D日常生活经验
缺铁———易引起贫血

缺钙———易得佝偻病或骨质疏松症

缺碘———易得甲状腺肿大

去除衣服上的油污———用汽油洗涤

热水瓶中的水垢———用食醋清除

使煤燃烧更旺———把煤做成蜂窝状

答案

答案:B

解答题
阅读理解

阅读理解

TUESDAY, July11

   SHANGHAI-The 12th International Processing, Packaging & End-Line Printing Exhibition opens at

Shanghai New International Expo Centre ( to July 13)

   Tel: 021 6209 5209

   HONGKONG-The Hong Kong International Textile and Garment Machinery and Technology Fair

2006 opens at Hong Kong Convention and Exhibition Centre ( to July 14).

   Tel: +852 2584 4333

THURSDAY, July 13

   SHANGHAI-The China(Shanghai) International Wedding Photographic Equipment Exhibition (Autumn) opens at Shanghai Mart ( to July16 ).

   Tel: 021 6272 2828

   HARBIN, Heilongjiang Province-The Ninth Harbin International Automobile Industry Exhibition and

Sports Centre ( to July 17 ).

   Tel : 0451 5363 5464

FRIDAY, July 14

   HONG KONG-The Hong Kong Wedding, Banquet & Wedding Accessories Expo 2006 opens at

Hong Kong Convention and Exhibition Centre ( to July 16 ).

   Tel: +852 2367 8385

WEDNESDAY, July 19

   SHANGHAI-The 14th Shanghai International Advertising Technology & Equipment Exhibition / Shanghai International Media Technology & Equipment opens at Shanghai New International Expo Centre ( to

July 22 ).

   Tel: 021 6328 8899

   SHANGHAI-The Shanghai International Outdoor AD Illuminating Technology & Equipment Exhibition, Outdoor Media Promotion Exhibition opens at Shanghai New International Expo Centre ( to July 22 ).

   Tel: 021 6321 7522

   SHANGHAI-PAPERTECH Shanghai 2006 opens at Shanghai New International Expo Centre ( to

July 22 ).

   Tel: 021 6328 8899

1 . More exhibitions are held in _______

A . Shanghai New International Expo Centre

B . Hong Kong Convention and Exhibition Centre

C . Shanghai Mart

D . Harbin International conference, Exhibition and Sports Centre

2 . How many exhibitions can you attend on July 15______

A . one    

B . two    

C . three    

D . four

3 . The text is likely to be a (an)________

A . business diary

B . product advertisement

C . private timetable

D . magazine