问题 不定项选择题

类推的思维方法在化学学习与研究中经常用到,但有时会产生错误的结论。因此,推出的结论最终要经过实践的检验才能决定其是否正确。以下几种类推结论中,不正确的是 [      ]

A.金属镁失火不能用二氧化碳灭火器灭火;金属钠失火也不能用二氧化碳灭火  

B.Fe3O4可以写成FeO·Fe2O3;Pb3O4也可以写成PbO·Pb2O3   

C.不能用电解AlCl3溶液来制取金属铝;也不能用电解MgCl2溶液来制取金属镁  

D.Al与S直接化合时可得到Al2S3;Fe与S直接化合时也可得到Fe2S

答案

BD

阅读理解

阅读理解

     With every Olympic song, I found an excitement growing inside me when I was first to skate at the

age of five. But, unfortunately, I was badly hurt in a match. I quickly stopped my skating. Smiling, my

understanding husband just shook his head, "Skating is your passion(酷爱之物), but of course we can

stay at home."

     It was crazy, I know, that a thirty-seven-year-old mother of two wanted to skate circles under disco

ball lights after 10 years. I found the excitement growing inside me. I loved to skate. So I was out there

having the time of my life, listening to the music with a smile upon my face and heart, with only one desire

to skate again.

     I belonged here. It was so right to be back on the ice.

     "Did you use to be a skater?" A little girl looked up at me with questioning eyes. Taking time to give

my answer, I looked around the rink(溜冰场), where I could see so many years of lessons, Olympic

dreams, and a love of the ice that I knew would never die.

     "No," I replied. "I am a skater." With a smile, I glided away. Skating had finally turned me into a

champion--a winner of a lifelong passion for my favorite sport.

1. The reason why the writer had to stay at home is that __________.

A. she was hurt

B. her husband didn't want her to skate

C. she had to look after her children

D. she didn't love skating any more

2. The writer started to skate __________ years ago.

A. 5

B. 10

C. 27

D. 32

3. The writer went back to skate because __________.

A. she wanted to be a champion of the Olympics

B. she loved skating very much

C. she wanted to earn a lot of money

D. she didn't love to stay at home

4. The Chinese meaning of the underlined word "glide" is "_________ ".

A. 滑走

B. 消逝

C. 旋转

D. 跑步

5. For the writer, __________ has come true.

A. to be a winner among all the skaters

B. to be a champion of the Olympics

C. to be a good mother

D. to win the lifelong passion

问答题 简答题