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问题 填空题

我们盼望已久的2008年北京奥运会火炬“祥云”于6月底将在新疆区内传递．“祥云”火炬采用的燃烧是丙烷（C3H4），符合“绿色奥运”的要求．试回答下列问题：

（1）丙烷属于______（填“无机物”或“有机物”）

（2）火炬点燃后，所发生的反应为C3H4+5O2=3CO2+4H2O该反应属于______反应，所用燃料符合“绿色奥运”的要求，其原因是______．

答案

（1）丙烷是含有碳元素的化合物，属于有机物；

（2）丙烷燃烧的化学方程式为：C3H8+5O2

 点燃 
.
 
3CO2+4H2O，该反应属于氧化反应；因为丙烷燃烧生成水和二氧化碳，不污染环境，所以所用燃料符合“绿色奥运”的要求．

故答案为：（1）有机物；

（2）氧化，产物无污染．

改错题

Sometime in February, my teacher told us about the city speech contest, its topic was “People who have overcome difficulties in their lives”. I thought of my grandma would be my perfect topic. Then I carefully prepared for contest. A couple of weeks later, after the first round I was choosing to be one of the seven finalists! The final was held soon. I was the sixth to presenting the speech. How a relief when I finished it! After the last person finished, the judge made their final decisions and announced that I have won first prize. The audience were going wildly clapping and cheering! I was extremely happy. It was such exciting a moment that I will always remember it.
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单项选择题

下列有关保险的叙述，错误的是()。

A．在我国，保险公司受中国保险监督管理委员会监督管理

B．保险公司的保户越多，承保范围越大，风险越分散

C．根据保险标的不同，保险可分为财产保险和健康保险两类

D．积聚的保险资金部分可用于投资，使保险资金得到增值
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