问题 选择题

等物质的量的下列有机物完全燃烧,生成CO2的量最多的是( )

A.CH4

B.C2H6

C.C3H6

D.C6H6

答案

答案:D

题目分析:在物质的量消相等的条件下,有机物中碳原子数越多,完全燃烧生成的CO2就越多,则根据有机物的化学式可知,D选项中碳原子数最多,生成的CO2最多,答案选D。

点评:该题是高考中额常见题型,属于中等难度的试题,试题基础性强,侧重对学生能力的培养和解题方法的指导与训练。该题的关键是利用好原子守恒,另外还要特别注意的是要分清楚是物质的量相等,还是质量相等,然后结合题意和有关方程式灵活运用即可。

单项选择题
阅读理解

阅读下面短文,根据其内容完成后面各项任务。

Confidence is very important in daily life. It can help you to develop a healthy attitude (态度). A study shows that the people who are more confident are much happier. They can have more chance to make themselves successful. Here are some suggestions about how to be more confident.

Speak loud   When you are not confident, you can’t do well what you want to do. You speak in a voice so low that other people can hardly hear you. Try to speak _______(1) enough so that people can hear you clearly. The high voice can _______(1) you become more confident.

Play sports   Physical exercise makes you tired but completely relaxed. A strong body helps you be full of confidence.(2)

Encourage yourself  Write down a list of things you did during the day to see how many things you have done well. Did you finish your homework? Did you tell a joke that made everybody laugh? Give yourself praise for the good things you’ve done.

Pick up a hobby   If you like singing, sing as much as you can. In some ways, a hobby can make you outstanding. And it will make you happy and confident.

Get rid of (消除) fear  Fear comes along with failure (失败). But it’s easy to overcome (克服) if you know that failure is part of your life. Don’t hide your head just because you said something stupid last time. Try to start again and believe you can do better.

小题1:在(1)处横线上填入适当的词。___________ ___________

小题2:将(2)处划线部分翻译成中文。______________________________________________

小题3:回答问题How many suggestions can help you to be more confident?______________

小题4:找出并写出所给句子的同义句。

If singing is your favourite, you can sing as often as possible.__________________________

小题5:找出并写出最能表达该短文主题的句子。

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