（9分）日常生活中人们广泛使用金属材料。

（1）下列关于金属材料的说法正确的是                （填字母序号）。

A．铝是人类最早利用的金属材料

B．铜是目前世界年产量最高的金属

C．大多数金属元素在自然界中以单质形式存在

D．日常使用的金属材料大多数是合金

（2）选择铸造硬币的材料不需要考虑的因素是            （填字母序号）。

A. 金属的导电性         B. 金属的耐腐蚀性

C. 金属的硬度           D. 金属价格与硬币面值的吻合度

（3）以上硬币涉及到Fe、Cu、Al、Ni（镍），已知Ni能够发生如下反应：

Ni+ H₂SO₄= NiSO₄+ H₂↑                Fe+ NiCl₂=" Ni" + FeCl₂

这两个反应的基本类型都是                          。四种金属活动性由强到弱的顺序为                                            （用元素符号表示）。

（4）工业炼铁可以把赤铁矿(主要成分为Fe₂O₃ )在高炉里和CO反应，生成单质铁，该反应的化学方程式是                                  ；

①氧化铁(Fe₂O₃)的相对分子质量是       ；

②2000t含氧化铁84％的赤铁矿中理论上可炼得含铁98％的生铁       t。

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Life is not easy, so I’d like to say “When anything happens, believe in yourself.”

When I was 14, I was too nervous to talk to anyone. My classmate often l___小题1:__ at me. I was sad but could do nothing. Later, s___小题2:___happened. It changed my life. It was an English contest. My mother asked me to take part in it. What a terrible idea! It meant I had to s___小题3:__ in front of all the teachers and students of my school!

“Come on, boy. Believe in yourself. You are sure to w__小题4:___.” Then, Mother and I talked about many different topics. At last I c___小题5:___the topic “Believe in yourself”. I tried my best to r__小题6:____ all the speech and practice it over 100 times. W __小题7:____ my mother’s great love, I did well in my contest. I could h__小题8:___ believe my ears when the news came that I had won the first place. I heard the cheers from the teachers and students. Those c__小题9:__ who once looked down on me, now all said “Congratulation!” to me. My mother hugged me and cried excitedly.

S___小题10:___ then, everything has changed for me. When I do anything, I try to tell myself to be sure and I will find myself . I try to tell myself to be sure and I will find myself. This is true not only for a person but also for a country.