问题

世界上第一个把圆周率的数值计算到小数点后第七位的人是( )

A.华佗

B.贾思勰

C.祖冲之

D.张衡

答案

答案:C

题目分析:魏晋南北朝时期,我国数学成就巨大,祖冲之是我国古代著名的数学家和天文学家,他的突出成就是取得了比较精确的圆周率,祖冲之利用割圆术,第一次把圆周率计算到小数点后的第七位数3.1415926-3.1415927之间,领先世界近千年。题目中A项是三国时期的医学家,B项是魏晋南北朝时期的农学家,D项是东汉时期的天文学家,根据所学知识,本题选C。

点评:本题难度较小,考察学生对圆周率的识记能力,祖冲之和圆周率是教材的基础知识点,学生根据课本知识就能得出答案,属于送分题。

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“Write All About It”

Centerville High School Essay(论文)Contest

Rules

1. Students are asked to hand in essays of 500 to 700 words of their own work. Any essay containing material copied from another source will be disqualified.

2. Manuscripts should be typed double-spaced, with the student’s name, address, and grade level on a separate sheet of paper.

3. Essays must be turned in by 4:00 P.M. on November 30. They can be brought to Mrs. Elton in Room 104 or to Mr. Markham in the school library.

Essay-Writing Tips

1. Catch your reader’s interest—Your opening should immediately pull your reader into your essay. Asking a question or starting with a story, or surprising statement is some good ways to do this.

2. Create a picture—Use active words that show your reader what is happening. Instead of telling your reader that “the room was disordered,” paint a picture using active verbs and lively adjectives.

3. Have a purpose—Well-written essays do more than just describe an event or express a viewpoint; they also communicate a message.

4. Check for mistakes—Read your paper over to check for mistakes. Ask another student to read your paper. Another pair of eyes will often spot a mistake you have missed.

5. Format your essay—Neatly type your essay on white paper Choose an attractive cover for handing in. The computer lab will be open after school from 3:15 to 4:45P.M. each day this month so that students can use the computers.

Prizes

Winning essays will be published in the Centervile Times. Everyone who takes part in it will also receive a free pass to enter one school activity this year.

First Prize: $50 savings bond

Second Prize: Dictionary and reference book

Third Prize: Pen set and journal

小题1:Which of the following rules is set for the essay contest?

A.Students can write something exactly as it is written in other books.

B.Students’ personal information should be listed on another piece of paper.

C.Essays must be brought to Mr. Markham in the computer lab on November 30.

D.The students winning the second prize will be awarded a dictionary and a book.小题2:Which of the following writing tips is given in the passage?

A.Drawing a picture to go with the essay.

B.Trying to communicate an important idea to readers.

C.Asking a teacher to find the mistakes you haven’t found.

D.Making the essay short enough to hold the readers’ interest.小题3:The article is written to           .

A.convince the students of the prizes available

B.explain how to write a good essay

C.inform the students of the essay contest

D.show how to organize an essay contest