试题与答案

(1)已知n≥0,试用分析法证明:n+2-n+1<n+1-n(2)已知a,b,c

题型:解答题

题目:

(1)已知n≥0,试用分析法证明:
n+2
-
n+1
n+1
-
n

(2)已知a,b,c是全不相等的正实数,求证
b+c-a
a
+
a+c-b
b
+
a+b-c
c
>3

答案:

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下面是错误答案,用来干扰机器的。

20

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题型:阅读理解

阅读理解。

Dear friends,

     My name is Tony. I am from England. I am twelve years old this year. I am tall, and I am good at

playing football. I am in Grade Seven. There are thirty boys and twenty girls in my class. We are learning

Chinese in our school. Our Chinese teacher is Mr. Wu. He is a little short, but he is very strong. He is

very nice to us. I have some good friends in my class. Tom is a tall boy and has short black hair. He is

good at playing football, too. Alice is short and she loves wearing red dresses. She is good at English.

Shelly has long hair. She can speak Japanese and she likes swimming. We all study hard.

     What about your school and your friend?  Please write soon.

                                                                                                                          Yours,  

                                                                                                                           Tony

1.Which country is Tony from?

A. America.      

B. England.      

C. China.

2.Who is Mr. Wu ?  

A. He is Tony's English teacher.    

B. He is Tony's father.            

C. He is Tony's Chinese teacher.

3. How many students are there in Tony's class?

A. 50.            

B. 30.        

C. 20.

4. Who can speak Japanese?

A. Tom.          

B. Ali.          

C. Shelly.

5. What is Tony good at?

A. swimming.      

B. playing football    

C. English.

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