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问题 多项选择题

依照《商业银行资本充足率管理办法》规定,下列提法正确的是（）。

A、商业银行对多边开发银行债权的风险权重为0%

B、商业银行对我国中央政府和中国人民银行本外币债权的风险权重均为0%

C、商业银行对我国中央政府投资的公用企业债权的风险权重为50%

D、商业银行对我国政策性银行债权的风险权重为0%

答案

参考答案：A, B, C, D

单项选择题

阅读下面短文，掌握其大意，然后从21—40各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题纸上将该选项标号涂黑。

During the war,my husband was stationed at an army camp in a desert in California.I went to live there in order to be 21  him. I hated the place .I had never  22  been so unhappy . My husband was ordered out on a long-term duty,and I was left in a tiny shack(棚屋) alone. The heat was  23  -almost 125 0F even in the shade of a cactus(仙人掌)。 24  a soul to talk to . The wind blew non-stop ,and all the food I ate ,and the evry air I breathed,were  25   with sand , sand , sand !

I was so sorry for myself that I wrote to my parents. I told them I was  26   and coming back home.I said I couldn’t stand it one minute longer. I  27  be in prison! My father answered my  28  with just two lines-two lines that will always sing in my  29  - two lines that completely changed my life :

Two men looked out from prison bars

One saw the mud ,the other saw the stars

I read those two lines  30   I was ashamed of myself. I made up my mind I would find out what was good in my present  31  ; I would look for the stars

I made friends with the natives,and their  32  amazed me. They gave me presents of their favorite artworks which they had  33  to sell to toueists . I studied the delightful forms of the cactus .I watched for the desert sunsets,and  34  for seashells that had been left there millions of years ago when the desert had been an ocean  35 

What brought about this  36   change in me ? The desert hadn’t changed , 37   I had .I had changed my  38   And by doing so ,I changed an unhappy experience into the most amazing  39  of my life . I was excited by this new world that I had dicovered I had looked out of my self-creatded prison and  40   the stars

40（）

A.sought

B.counted

C.found

D.reached
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实验题

金属材料被广泛的应用于我们的生活中，不仅是因为其物理性能优良，还与它们的化学性质密切相关。下面是小明同学设计测定金属铁、铜和镁的活动性的探究实验过程和实验记录，请你一起探究。

【实验目的】测定金属铁、铜和镁的活动性强弱

【所用试剂】稀硫酸、硝酸银溶液、光亮的薄铁片、薄铜片、薄镁片

【实验过程】步骤Ⅰ 将铁片、铜片、镁片分别在空气中点燃片刻，观察燃烧现象；

步骤Ⅱ 将铁片、铜片、镁片分别放入三只盛有溶质质量分数相同、体积相同的稀硫酸的试管中；

步骤Ⅲ 将铁片、铜片、镁片分别放入三只盛有溶质质量分数相同、体积相同的硝酸银溶液的试管中。

实验现象记录表

金属空气稀硫酸硝酸银溶液
铁－  
铜－－ 
镁   
 

【实验记录】用“”表示能观察到实验现象，用“－”表示观察不到实验现象(见表)。

(1)通过步骤Ⅰ可以得出三种金属中镁的金属活动性最强，判断依据是                         。

(2)运用“控制变量法”设计实验方案是化学研究的重要方法。步骤Ⅱ和步骤Ⅲ中，需要控制的实验条件除了金属的体积、溶液的体积、溶质质量分数以外，还需要控制的条件是                           。写出镁和稀硫酸反应的化学方程式                                 ，此反应属于         。

【实验结论】金属铁、铜和镁的活动性由强到弱的顺序是             (用元素符号表示)。

【反思交流】若利用上述试剂制取氢气，小明认为应该选择金属铁和稀硫酸反应，而不选择金属镁和稀硫酸反应，他的理由是                       。
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