问题 选择题

已知NO2气体既有氧化性又有还原性,能与下列物质发生氧化还原反应的是(  )

A.CO2

B.N2

C.H2O

D.O2

答案

二氧化氮虽然既有氧化性又有还原性,但不和二氧化碳、氮气、氧气反应,能和水反应,反应方程式为:3NO2+H2O═2HNO3+NO,该反应中二氧化氮既体现氧化性又体现还原性,故选C.

阅读理解

阅读表达。

        In the morning, Slim got up and prepared breakfast for his wife as usual. Nicole, his wife, was

listening to music in the bedroom. Suddenly, he felt that his body was shaking. Slim had the rapid response

that there was an earthquake! He shouted quickly, "Dear, earthquake! Go to the toilet!" Nicole heard the

shouting, took the first-aid box quickly and ran into the toilet. The house was shaking even more

dramatically (剧烈地).

        Bathroom was the next door to the kitchen. Slim picked up a kitchen knife and two pieces of bread

outside the kitchen. Slim tried to run along the wall to help Nicole. However, there was a dark suddenly

with an explosion. The house crashed down and many things fell from above. Nicole was quickly buried in

ruins. She felt it very difficult to breathe and tried to stand up, but impossible.    

        A few minutes later, the land was silent. Nicole heard the sound of short breath and thought it was

Slim! She shouted to him but ___________! He probably fainted. Nicole kept calling his name and she

finally heard a response. Two people encouraged and calmed each other. They knew that there must be a

way to escape.     

        Slim found that they were close and were separated by the fallen stones and some powder. He

started to dig with the kitchen knife. He felt pain in his fingers. Finally, he removed the last piece of larger

stones. Slim touched Nicole's one hand, then dug the surrounding stones of her body. Finally, Nicole was

able to move slowly. Two people sat on the ground and hugged together.

1. What is the best title of the passage? (Please answer within 5 words)

_________________________________________________________________________

2. Why did Nicole feel it very difficult to breathe? (Please answer within 7 words)

_________________________________________________________________________

3. Fill in the blank in Paragraph 3 with proper words. (Please answer within 4 words)

_________________________________________________________________________

4. List three main things the couple did after the house crashed down. (Within 15 words) .①                               

                            

                            

5.What’s the most important three reasons do you think for their survival? (Please answer within 10

words)

___________________________________________________ ______________

单项选择题