题型:阅读选择 题类: 难易度:普通
浙江省诸暨市浣纱初级中学2024-2025学年九年级上学期9月月考英语试题
If you've ever used pi in math class, you probably used the number 3.14. In fact, the number for pi is much longer. Pi is called an irrational number (无理数) because the digits (数位) after the decimal point (小数点) never end or repeat.
}
>In 2015, a young man from India named Rajveer Meena set a world record by memorizing 70,000 digits of pi. But pi is much longer than that.
On Pi Day ( March 14th) this year, a company called Solidigm said it calculated (计算) pi to105 trillion (万亿) digits. And the 105 trillionth digit is 6. It broke the record for how many digits of pi we know.
Pi is really useful for circles in math. It helps us connect the circumference with the diameter of a circle.
Even NASA scientists use pi for their work of studying space. But they only need about 15 digits of pi for their calculations.
Calculating pi also has another important use. It's how scientists test new computer programs and data storage systems (数据存储系统).
Solidigm's calculation of pi took around 75 days to finish. The company's owner Brian
Beeler said that the achievement needed a lot of work. They had to plan the calculation very carefully.
This isn't the first time that Solidigm has calculated pi. In 2022, Google Cloud calculated 100 trillion digits of pi. Solidigm matched that in 2023.
In the future, we'll keep finding more and more digits of pi. We'll never be able to calculate all the digits of pi because it goes on forever. But it still helps us see how great computers can be.
Britney School is looking for a student president for the new term. The following speeches are from four candidates(候选人).
I'm Jenny. I come to you and want a chance to be your student president. I could help with your problems on all the subjects. I may not be running on the most exciting platform. I do, however, believe in failness for all students. My goal: one-on-one Q&. A time for all the subjects. | Hello, everyone ! My name is Albert. I will help you with your life at school if I become the student president. I will ask our school to have better lunches. Each one of you wants healthy meals, I believe. My goal: longer lunch breaks and healthier desserts. |
Hi, everyone! I'm glad to introduce myself. I'm Eva. Since we have a lot of study stress these days, more clubs will be opened after school during the school days to help you to relax if I can be the student president. My goal: hotline service at 875-6352 from Monday to Friday. | I'm Mark. Do you want to vote for me? I'm running for student president. I will try different ways to make our life better and more colorful. A lot of things can be done to relax like more time. for sports and exercise. My goal: more game time and a better gym, sometimes yoga. |
试题篮