问题 选择题

2003年3月20日,美国以伊拉克拥有大规模杀伤性武器为由,发动了伊拉克战争.大规模杀伤性武器包括化学武器、生物武器和核武器.早在第一次世界大战期间,德国就曾使用了化学武器--毒气.当时德军使用的毒气是氯气(Cl2),下列有关氯气的说法不正确的是(  )

A.氯气是由氯原子构成的

B.氯气有毒

C.氯气的相对分子质量为71

D.氯气是单质

答案

A、由氯气的化学式为Cl2,则氯气是由氯气分子直接构成的,则说法不正确;

B、由德军使用的毒气是氯气可知,氯气有毒,则说法正确;

C、由氯气的化学式为Cl2,则相对分子质量为35.5×2=71,则说法正确;

D、由氯气的化学式为Cl2,则该物质是由一种元素组成,则属于单质,则说法正确;

故选A.

阅读理解

    Nathan Sawaya's childhood was a lot of fun. He drew cartoons, wrote stories, and played with plastic toy bricks (积木). His grandparents bought his first set of toy bricks when he was five years old and he's been building with toy bricks ever since. He even took his building bricks to college with him! Instead of books and a computer, he had a model of Greenwich Village made of bricks on his desk. 

    Nathan started as a lawyer but gave up His highly-paid (高薪的) job to become an artist that uses toys in his art. He uses toy bricks to build everything from the Statue of Liberty(自由女神像) to Superman! He has more than 1.5 million colored bricks in his working room in New York which he uses to make pieces of art. He started by building small models but then decided to do something big and created a self-portrait (自画像). It took him two days just to build the eyes.

     Nathan's work has appeared in museums around the world. Children love his art because it is made out of the same toys that they play with at home and adults love his work because it is fascinating. Since it began in2007, Nathan's exhibition "The Art of the Brick" has been very popular with museum visitors everywhere.     "I'm proud that I took a dream I had as a child, to become an artist, and I have actually made a job out of it," says Nathan. "To do what you love in life is the most important thing." 

1. What did Nathan put on his desk at college? 

A. The Statue of Liberty.    B. Superman.    C. His serf-portrait.    D. A Greenwich Village modal. 

2. Why did Nathan give up his job as a lawyer? 

A. Because he made little money out of a lawyer.

B. Because he wanted to make toys for the children.

C. Because he decided to become an artist of toy bricks.

D. Because he was going to work in the museum instead.

3. What does the underlined word "it" in Paragraph 3 refer to? 

A. Nathan's work.                 B. Nathan's exhibition.        C. Nathan's art.      D. Nathan's self-portrait

4. What would be the best title for the passage?

A. The Brick Artist                    B. The Brick Exhibition

C. Toy Bricks for Adults           D. The Artist's Childhood

单项选择题