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问题 选择题

已知下列热化学方程式：

Zn(s)＋O2(g)＝ZnO(s) △H ＝－351.1kJ·mol－1

Hg(l)＋O2(g)＝HgO(s) △H ＝－90.7 kJ·mol－1

由此可知反应Zn(s)＋HgO(s)＝ZnO(s)＋Hg(l)的焓变为（   ）

A．－260.4 kJ·mol－1

B．－441.8 kJ·mol－1

C．260.4 kJ·mol－1

D．441.8 kJ·mol－1

答案

答案：A

题目分析：Zn(s)＋HgO(s)＝ZnO(s)＋Hg(l)可以由Zn(s)＋O2(g)＝ZnO(s) 减去Hg(l)＋O2(g)＝HgO(s)得到，所以Zn(s)＋HgO(s)＝ZnO(s)＋Hg(l)的焓变为－351.1kJ·mol－1-（－90.7 kJ·mol－1）=－260.4 kJ·mol－1，故本题的答案选择A。

点评：本题考查了晗的计算，该考点是高考考查的重点和热点，本题有注意晗变的符号，该题比较基础。

阅读理解

阅读理解。

     Don't have enough time or money to visit the World Expo (世界博览会) in Shanghai? Don't worry.

Check the official website, Expo Online, at www.expo2010.cn. Without spending any money, you'll feel

like you're enjoying the best of Shanghai.

     Expo Online has two main parts. One is a site tour. It shows you a virtual (虚拟的) park with the same

settings as the real Expo. Moving the mouse, you can look at the 3D pavilions (展馆) from every angle (角度). Online, you won't have to pay to enter and enjoy the pavilions. Haibao, the mascot, will guide you and explain

what you're seeing in either Chinese or English.

     The other part of the website, Expo Carnival (狂欢节), allows you to rebuild the pavilions and play games

with Haibao. You can also upload your photos, videos and diaries there.

     The Web offers lots to see and do, and you don't even have to leave home. Why not check it out?

1. How many main parts does "Expo Online" have?

A. Two.

B. Three.

C. Four.

2. What's the mascot of Expo 2010?

A. Nini.

B. Haibao.

C. Huanhuan.

3. What's the Chinese meaning of the underlined word "upload"?

A. 购买

B. 下载

C. 上传

4. Which of the following is TRUE according to the passage?

A. You can visit the Expo 2010 online without spending any money.

B. Expo Carnival allows you to play games with a mouse.

C. The mascot can explain what you're seeing in three languages.

5. Which of the following is the best title for the passage?

A. Make Enough Money for the World Expo

B. Go to Shanghai to Visit the World Expo

C. Visit the World Expo from your Home

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选择题
下列各组句子中，划线的词的意义和用法相同的一组是
[ ]
A．师不必贤于弟子 而耻学于师
B．不敢言而敢怒 谁得而族灭也
C．盖在殷忧，必竭诚以待下 虽董之以严刑
D．凡植木之性，其本欲舒 以子之道，移之官理
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