臭氧层是地球的保护伞,NO气体破坏臭氧层时会发生O3+NO→NO2+O2的反应,

题型:选择题

问题:

臭氧层是地球的保护伞,NO气体破坏臭氧层时会发生O3+NO→NO2+O2的反应,该反应中的氧化剂是(  )

A.O3

B.NO

C.NO2

D.O2

考点:氧化反应
题型:选择题

找出单词并写下来。

1. p a s c a s h i e r t ____________________

2. m o t w a i t r e s s h ____________________

3. d e f c l e r k o t h ___________________

4. a b a b u s i n e s s w o m a n ____________________

题型:选择题

(8分)如图,光滑水平桌面上,弹簧一端固定在O点,另一端系一质量的小球,使小球绕O点做匀速圆周运动。已知弹簧原长,劲度系数,小球做圆周运动的角速度,求小球做匀速圆周运动时弹簧长度。

题型:选择题

When I was growing up in America, I was ashamed of my mother’s Chinese English. Because of her English, she was often treated unfairly. People in department stores, at banks, and at restaurants did not take her seriously ,did not give her good service ,pretended not to understand her ,or even acted as if they did not hear her .

My mother has realized the limitations of her English as well. When I was fifteen, she used to have me call people on phone to pretend I was she . I was forced to ask for information or even to yell at people who had been rude to her. One time I had to call her stockbroker (股票经纪人).I said in an adolescent voice that was not very convincing, “This is Mrs.Tan..”

And my mother was standing beside me ,whispering loudly, “Why he don’t send me cheek already two week late.”

And then , in perfect English I said : “I’m getting rather concerned .You agreed to send the check two weeks ago, but it hasn’t arrived.”

Then she talked more loudly. “What he want? I come to New York tell him front of his boss.” And so I turned to the stockbroker again, “I can’t tolerate any more excuse. If I don’t receive the check immediately , I am going to have to speak to your manager when I am in New York next week.”

The next week we ended up in New York. While I was sitting there red-faced, my mother, the real Mrs.Tan, was shouting to his boss in her broken English.

When I was a teenager, my mother’s broken English embarrassed me. But now, I see it differently. To me, my mother’s English is perfectly clear, perfectly natural. It is my mother tongue. Her language, as I hear it, is vivid, direct, and full of observation and wisdom. It was the language that helped shape the way I saw things, expressed ideas, and made sense of the world.

小题1:Why was the author’s mother poorly served?

A.She was unable to speak good English.

B.She was often misunderstood.

C.She was not clearly heard.

D.She was not very polite.小题2:From Paragraph 2, we know that the author was ________ .

A.good at pretending

B.rude to the stockbroker

C.ready to help her mother

D.unwilling to phone for her mother小题3:After the author made the phone call, _______.

A.they forgave the stockbroker

B.they went to New York immediately

C.they failed to get the check

D.they spoke to their boss at once小题4:What does the author think of her mother’s English now?

A.It confuses her.

B.It embarrasses her.

C.It helps her understand the world.

D.It helps her tolerate rude people.小题5:We can infer from the passage that Chinese English ________.

A.is clear and natural to non-native speakers

B.is vivid and direct to non-native speakers

C.has a very bad reputation in America

D.may bring inconvenience in America

题型:选择题

某人准备在3年后以100000元购买一部汽车,若银行存款的复利年利率为10%,该人现在应存入银行的款项是()。

A.70100元

B.75131元

C.76221元

D.77332元

题型:选择题

非线性药物动力学中两个最基本而重要的参数是哪一项

A.t1/2和K

B.V和Cl

C.Tm和Cm

D.Km和Vm

E.K12和K21

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