2026-2027 学年九月阶段考反馈练习
一、阅读理解
(2026·厦门·二模)
Do fun activities on Pi Day
Pi Day is marked every year on March 14 by scientists,
mathematicians, and schools. Pi is a never-ending number or
ratio (比率). The first three digits of pi are 3. 14, which is why
the holiday is celebrated on March 14. In 2009, the US House
of Representatives established it as National Pi Day. Here’s how
to celebrate that day and more.
Play pi games
You can challenge yourself to see how many digits of pi
you can memorize. The first 16 digits, which NASA engineers
use to make accurate calculations, are 3. 141592653589793.
You could also play a beanbag game. Draw a large circle on the
ground in chalk and label it with the first few numbers of pi: 3,
1, and 4. Toss (投掷) beanbags and try to land them on the digits
of pi in order, starting with 3.
Have a feast
Get into the spirit of Pi Day with a special meal that
features round objects. For example, you might have bagels,
doughnuts, pancakes, pizza, tortillas, or burgers. Another way
to celebrate Pi Day is to bake a pie to share with family and
friends.
Pi in everyday life
Humans have used pi to
build, explore, and advance
technology.
Architecture
Engineers use pi to ensure safety and
stability when designing
curved bridges and tunnels
and in design elements like
arches and round columns.
Space exploration
Scientists use pi to map the
surface area of planets, keep
the wheels of rovers (探测器)
on Mars turning, and measure
craters on moons.
Navigation Global
positioning systems (GPS),
like you might find in apps
that give directions, use pi to
calculate specific locations on
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