问题 选择题

要不断提高我国外交工作能力和水平,努力使我国在政治上更有影响力、经济上更有竞争力、形象上更有亲和力、道义上更有感召力,为全面建设小康社会、加快推进社会主义现代化营造良好的国际环境和外部条件。四个“力”的提出表明

A.我国在各种全球问题上积极参与多边合作

B.我国提高综合国力兼顾物质硬实力与精神软实力

C.我国平等参与国际事务的要求日益强烈

D.世界多极化趋势加强

答案

答案:B

阅读理解

阅读理解。

     There is a photo on Becky's desk. It is a picture of her family. There are four people in it. 

     The man is her father. He is 38 years old. He can speak Chinese. There is a woman behind Becky. She

  is Becky's mother. She is 37 years old. She can't speak Chinese, but she speaks English. They're

  teachers. They work in a school. There is a boy in the picture, too. He is Becky's brother. His name is

  Jack. He is twelve years old. He can play football and ride a bike. He has got an English friend. Her

 name is Betty.

     Becky and her brother are in the same school, but they aren't in the same grade. They look like their

 mother. They are American. It's a big family.

1. _____ can speak Chinese.

    A. Becky's father                        

    B. Becky's mother

    C. Becky's brother                    

    D. Becky

2. Becky's mother is _____ years old.

    A. 38                

    B. 37            

    C. 35                  

    D. 36

3. Jack's friend is _____.

    A. American                            

    B. Japanese

    C. English                                

    D. Chinese

4. Becky and her brother are _____.

    A. in the same school but not the same grade

    B. in the same school and the same grade

    C. in the same school and the same class

    D. in the same grade but not the same class

5. Becky and Jack look like _____.

    A. their parents                  

    B. their grandparents

    C. their father                    

    D. their mother

实验题

(14分)本世纪,人类社会将逐渐步入氢经济时代。目前大规模产氢方式仍是化学制氢。

I、催化重整制氢

以甲醇为例,反应制氢气的一般途径有:

CH3OH(l)=2H2(g)+CO(g)             △H1=+128 kJ·mol-1

CH3OH(l)+H2O(l)=3H2(g)+CO2(g)     △H2=" a" kJ·mol1

已知:H2(g)+1/2O2(g)=H2O(l)         △H=-286 kJ·mol-1

为求得△H2,还要知道        的燃烧热,若其燃烧热为△H=一283 kJ·mol-1,则△H2=            

Ⅱ、金属置换制氢

(1)研究表明,刚切割的金属表面具有很高的反应活性。当铝或铝合金在水中被切割或碾碎的时候,可以持续地释放出氢气。使用铝与水反应制氢气比使用其它活泼金属与水反应制氢气的优点有:①价廉,成本较低;②                      

(2)利用天然气重整得到的CO、H2混合气对金属氧化物进行还原,然后将金属与水反应放出氢气,由此达成一个良性循环。根据高中所学的知识合理预测该金属单质,并写出该金属在加热的条件下与水蒸汽反应的化学方程式                  

III、太阳能制氢

利用光能分解水必须要有催化剂的参与。下列有关催化剂的说法正确的是               

A.使用高效催化剂分解水制得H2的同时还可以获得能量

B.使用高效催化剂后常温下水可以自发分解

C.硅胶具有多孔结构,有较大的表面积,常用做催化剂的载体

D.对于可逆反应,催化剂在增大正反应速率的同时也增大逆反应速率Ⅳ、配位氢化物制氢

在硼氢化钠(NaBH4)水溶液中加入特定催化剂后,可以迅速地发生水解反应生成偏硼酸钠和氢气。请写出此水解反应的化学方程式                        

将无水偏硼酸钠、氢化镁(MgH2)放入球磨设备中,通入氩气或氢气并保持压强100~500 kPa研磨0.5~4 h,即可得到硼氢化钠。研磨过程中需要通入氩气或氢气并保持压强100~500 kPa的目的是