阅读理解。
Mary is an American doctor. She is now in China. She works in a hospital in Hangzhou. She is also
learning Chinese medicine (医学) there. She likes Chinese medicine very much. She loves to work for
the patients (病人), because it's meaningful (有意义的). She works hard in the day and read English
books on Chinese medicine at night. She learns Chinese from Chinese doctors and her Chinese friends.
Now she can speak some Chinese. She can read some Chinese, too.
Her husband (丈夫) John is a policeman. He works in a police station in Hangzhou, too. He works
hard, too. He's very busy. He works on Saturdays and Sundays. His work is kind of dangerous, but he s
ays, "I love my job very much. It's exciting and I can serve (服务) the people."
1. Mary and her husband are from _______.
A. America
B. English
C. China
D. Australia
2. Mary loves her work, because _______.
A. it's busy
B. she can help the patients and her job is meaningful
C. she likes Chinese medicine
D. she can work in Hangzhou
3. Mary often reads books on ______.
A. Chinese history
B. English medicine
C. English
D. Chinese medicine
4. -How is Mary's Chinese? -_______.
A. She learns Chinese from Chinese books
B. She doesn't want to learn Chinese
C. She learns Chinese from others and can speak and read some Chinese now
D. She can speak some Chinese, but she can't read it.
5. Which of the following is wrong(错)?
A. John is busy.
B. John loves to work for people.
C. John needn't work on weekends.
D. John and his wife (妻子) work in the same (相同的) city.
N2O4，恒温下，再向容器通入一定量N2O4，重新建立平衡后，容器中N2O4的体积分数 [ ]