第四节 语篇理解
请仔细听短文,并根据短文内容补全以下信息,每空填一词,将单词写在答题卡上。短文读两遍。
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More and more people from all over the world are visiting Beijing. ·People want to see the Summer Palace, many 26 and the Great Wall. ·They visit China in 27 ways nowadays. ·Many students go on cultural exchange(文化交流) trips and 28 six months or a year studying at a Chinese university. ·For other people, organised trips to China are the most 29 ways of visiting the country. ·The number of people visiting China is 30 greatly during the 2010 World Expo(世界博览会)in Shanghai. |
30、我国约在南北朝时就开始冶炼黄铜,黄铜是铜和锌的合金(Cu-Zn),它可用来制造电器零件及日用品。小华利用一瓶稀盐酸和相关的仪器,测定黄铜样品的组成(不考虑黄铜中的其他杂质)。将30mL稀盐酸分三次加入到10g黄铜样品粉末中,每次充分反应后,测定生成氢气的质量,实验数据见下表:
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第一次 |
第二次 |
第三次 |
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连续加入盐酸的体积/mL |
10 |
10 |
10 |
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生成氢气的质量/g |
0.08 |
0.08 |
0.04 |
(1)从上表数据分析,小华用10 g合金粉末总共收集到氢气_______g;
(2)求该合金中铜的质量分数。
泰安市二O一O年初中学生学业考试