2021-22学年度第2期总第752期(6版)
Trillions of pi (Page 6)

I. Read the text and answer the following questions.
1. Who calculated pi to seven decimal places of accuracy?
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2. What’s the significance of the new record according to De Gier?
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3. What’s the main purpose of the article?
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II. Combine the following sentences into one sentence.
1) Zu Chongzhi (429-500) was a Chinese mathematician.
2) He calculated pi between 3.1415926 and 3.1415927.
3) This record would not be surpassed (超过) for about 1,000 years.
4) Al-Kashi was an Iranian mathematician.
5) He calculated its accuracy up to 16 decimal (小数的) places.
                                        
III. Find the following expressions in the text.
1. 被定义为……                          2. 圆的周长及其直径
3. 取得了不同程度的成功                 4. 出现
5. 把......比作                          6. 设定一个基准

参考答案：
I.
1. Zu Chongzhi.
2. It inspires people to keep pushing boundaries.
3. To inform readers of new research on pi.

II.
Zu Chongzhi (429-500), a Chinese mathematician, calculated pi between 3.1415926 and 3.1415927, a record which would not be surpassed (超过) for about 1,000 years - until Al-Kashi, an Iranian mathematician, calculated its accuracy up to 16 decimal (小数的) places.

III. 1. be defined as                       2. a circle’s circumference and its diameter      
3. with varying degrees of success      4. pop up        
5. compare to                       6. set a benchmark