问题 选择题

(2011年湖北宜昌,1题,2分)空气中含量最多的气体是

A.氮气

B.氧气

C.二氧化碳

D.稀有气体

答案

答案:A

分析:根据空气中各成分及体积分数来回答本题,并能灵活运用它们解释一些生活中常见的现象.

解答:解:空气中各成分及体积分数为:氮气:78%、氧气:21%、稀有气体:0.94%、二氧化碳0.03%、水蒸气和杂质:0.03%.

故选A.

点评:熟记空气中各成分及体积分数,知道空气中的主要气体,哪种气体最多,哪种气体最少.

单项选择题
阅读理解

阅读理解

     At a young age, Patti Wilson was told that she was an epileptic(癫痫患者). Her father, Jim Wilson,

is a morning jogger. One day she said, "Daddy, I want to run with you every day, But I'm afraid I'll have

a seizure(发作).

     Her father told her, "If you do, I know how to handle it, so let's start running!"

    That's just what they did every day. It was a wonderful experience for them to share. And there were

no seizures at all while she was running. After a few weeks, she told her father, "Daddy, I want to break

the world's long-distance running record for women."

     So she did. That year, she wore a T-shirt that read, "I love epileptics" and completed her run to San

Francisco. Her dad ran every mile at her side, and her mom, a nurse, followed in a car behind them in

case anything went wrong.

     In her second year in college, Patti's classmates got behind her. They built a giant poster that read,

"Run, Patti, Run!"

     Her foot was injured when she was running to Portland. A doctor told her she had to stop her run.

     "Doctor, you don't understand," she said, "This isn't a whim(突发的奇想)of mine. I'm doing it to

break the chains on the brains that limit so many others. Isn't there a way I can keep running?" "Yes, but

it would be incredibly painful." The doctor said. She told the doctor just to do it.

     At last she finished the run to Portland and completed her last mile with the governor of Oregon.

                  

1. The underlined part "a morning jogger" in Paragraph 1 means a person __________.

A. who gets up early in the morning

B. who eats breakfast quite early

C. who runs in the morning

D. who reads in the morning

2. When did Patti decide to break the world's long-distance running record for women?

A. When she knew she was a epileptic,

B. After she ran with her father for a few weeks.

C. When she was in her second year in college.

D. After she completed her run to San Francisco

3. What's Patti's mother's attitude towards her run?

A. Supportive.

B. Confident

C. Opposed.

D. Unconcerned

4. Patti continued running after getting injured because _______________.

A. her injury didn't affect her run

B. she wanted to win the competition

C. she wanted to prove that nothing is impossible

D. she wanted to run with the governor of Oregon

5. What would be the best title for the text?

A. The love between a father and his daughter

B. The friendship between epileptics

C. Supper runner ------ Patti Wilson

D. The benefits of running