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金属用途广泛，其结构和性质等是化学的重要研究内容。 （1）下图是铝的原子结构示意图。下列说法不正确的是 。 A．铝原子的质子数为13 B．在化合物中铝通常显+3价 C．铝是地壳中含量最多的元素 D．铝可作导线是由于它具有良好的导电性 （2）某化学小组用一定量AgNO 3 和Cu(NO 3 ) 2 混合溶液进行了下图实验， 并对溶液A和固体B的成分进行了分析和实验探究。 【提出问题】溶液A中的溶质可能有哪些？ 【作出猜想】①只有Zn(NO 3 ) 2 ② Zn (NO 3 ) 2 、AgNO 3 ③ Zn (NO 3 ) 2 、Cu(NO 3 ) 2 ④Zn (NO 3 ) 2 、AgNO 3 、Cu(NO 3 ) 2 【交流讨论】不合理的猜想是 （填标号），其理由是 。 【实验探究】若猜想①成立，通过以下实验可确定固体B的成分，请将下表填写完整。 （3）下图是工业炼铁示意图。其中，焦炭的作用是燃烧提供能量和 ；有铁生成的化学方程式为 。 （4）某工厂利用废铁屑与废硫酸起反应来制取硫酸亚铁。现有废硫酸49 t（H 2 SO 4 的质量分数为10%），与足量废铁屑起反应，可生产硫酸亚铁的质量是多少？
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【单选题】What can we learn about the man?
A.
He is having a job interview.
B.
He is studying hotel management.
C.
He is serving a customer.
D.
He is preparing for his graduation.
【单选题】How did Wrights career begin?
A.
He was hired as a draftsman in his family project.
B.
He managed his family property in Wisconsin.
C.
He built a small house in his hometown.
D.
He worked as a builder in his hometown.
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【单选题】Which of the following makes Andy Warhol unique as an artist?
A.
He was able to make a huge amount of money when he was still alive.
B.
He pioneered an art movement unparalleled in other countries.
C.
He is the subject of the world's largest museum devoted to a single artist.
D.
He is known to have created the most expensive piece of visual art in history.
【单选题】Even when he is with others, he feels rather ______.
A.
alone
B.
single
C.
lonely
D.
unique
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