在photoshop中，按（）快捷键可以取消选区。

有下列二个反应：①Fe（s）+CO₂（g）═FeO（s）+CO（g），平衡常数为K₁；

②Fe（s）+H₂O（g）═FeO（s）+H₂（g），平衡常数为K₂．测得在不同温度下，K₁、K₂值如下：

温度/℃	K1	K2
500	1.00	3.15
700	1.50	2.25
900	2.50	1.50

（1）若500℃时进行反应①，CO₂起始浓度为2mol/L，CO₂的转化率为______．

（2）在一个体积为10L的密闭容器中，加入足量的Fe、FeO粉末，然后：

①再充入CO₂和H₂O（g）各1mol，控制一定的温度，以上二个反应同时达到平衡．在______℃

c(CO)

c(H2)

的值最大．

②再充入CO₂2mol和H₂ 4mol，控制在900℃，以上二个反应达到平衡后，计算平衡时氢气的体积分数______．

完形填空。

Happiness is important for everyone. Most people want to be happy,   1   few know how to find happiness. Money and success alone   2   lasting happiness. Happiness depends on ourselves. In other words, we make   3   own happiness. Here are   4   ways help you be happier.         5   secret of happiness is to enjoy the simple things in life. Too often, we spend so much time   6   about the future-for example, getting into college or getting a good job-that we fail to enjoy the   7  . You should enjoy life's simple pleasures such as   8   a good book, listening to your favorite music, or spending time with close friends. People who have several close friends tend to live happier and healthier lives.      The second secret to leading a happy life is to be   9  . Many people experience this dancing, or playing a sport. You can forget about your problems, and  10  think about the activity.      Finally, many people find happiness in helping  11 . According to studies, people feel good  12  they volunteer their time to do many meaningful things for other people. If you want to feel happier, do  13  for someone. You can help a friend  14  his or her studies, go shopping to get food for  15  old neighbour, or simply help out around the house by washing the dishes.

( )1. A. but              ( )2. A. do not accept    ( )3. A. us               ( )4. A. few              ( )5. A. The first        ( )6. A. thinking         ( )7. A. past             ( )8. A. seeing           ( )9. A. active           ( )10. A. ever            ( )11. A. another         ( )12. A. what            ( )13. A. something nice    ( )14. A. in              ( )15. A. a               B. as            B. do not take           B. our              B. a few             B. At first       B. think              B. present            B. watching         B. quiet               B. never           B. other                 B. when        B. something serious      B. on               B. an            C. or                    C. do not bring                   C. ours                    C. a little                   C. First of all           C. to think                   C. future                      C. reading                  C. strict                       C. only                   C. others                           C. where                C. something difficult                   C. discuss                 C. have brought

有一种溶液X含NaCI，NaOH，Na₂CO₃，Na₂SO₄，CuSO₄中的部分物质．某兴趣小组进行探究性实验，下面是小组成员探究的部分结果．请你判断其中正确的是（　　）

A．观察溶液X的颜色，溶液呈无色，X中不含有CuSO₄

B．取少量溶液X于试管中，滴加两滴无色酚酞试液，溶液变红色，x一定含NaOH

C．另取少量溶液X于试管中，滴加BaCl ₂溶液，产生白色沉淀，X中可能含Na₂CO₃和Na₂SO₄

D．向步骤C的试管中继续滴加稀盐酸，沉淀不溶解，X中肯定含有Na₂CO₃和Na₂SO₄

2003年非典疫情暴发，北京、广州被宣布为疫区，除了哪项之外，当地政府报经上一级政府批准后可以采取下列紧急措施（）。

A.限制或者停止集市、影剧院演出或者其他人群聚集的活动

B.停工、停业、停课

C.封闭或封存被传染病病原体污染的公共饮用水源、食品及相关物品

D.把患者带离出境

E.封闭可能造成传染病扩散的场所

翻译：早孤，绝惠，十四入泮。