问题 单项选择题

某企业2005年增加值408.72万元,要求2005年至2010年平均发展速度为105%,则2010年增加值约为()。

A.522万元

B.548万元

C.497万元

D.429万元

答案

参考答案:A

解析:

平均发展速度通常按几何平均法计算。几何平均法的实质是要求从最初水平(a0)出发,按平均发展速度发展可达到的期末水平(an)。即:,则。

由题知y0=408.72,n=5,

=105%,则yn=y0=408.72×(105%)5=521.64≈522(万元),即2010年增加值约为522万元。

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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