11．
On March 14，math and science lovers around the world celebrated a special day：Pi Day．
Pi is equal to about 3.14，but the number goes on endlessly．It is sometimes written in Greek，π．With the help of computers，mathematicians have been able to calculate（计算） pi out to over a trillion （万亿） decimal （小数的） places，but there is still no end to the number．This makes pi puzzling，even for the most famous scientists and mathematicians．
Pi Day is celebrated around the world on March 14，since how we write this date，3/14，looks just like the number pi．
For some people，the appeal（感染力） of Pi Day goes far beyond math and science．Pi shows up throughout popular culture．You can see it in movies，comics，music and more．"In modern movies，any time the filmmaker wants to produce a sense of mystery（神秘），often the symbol pi is used，"says David Blatner，Jewish American writer of The Joy of Pi．
People also love trying to memorize the digits （数字） of pi and competing against others to see who can remember the most．Many teachers hold class contests to see how many numbers their students can memorize．The Guinness World Record for reciting the most digits of pi is held by Lü Chao of China，who successfully recited pi out to nearly 67，890decimal places．
Above all，Pi Day is about having fun with the number．People celebrate Pi Day by eating or throwing pie and with fun pi-related games and activities．This year，Princeton，New Jersey，held a birthday party for Albert Einstein whose birthday also falls on March 14．There was also a"Walk a Pi Event"where people walked 3.14miles together．Just like the number itself，the possibilities for Pi Day are truly endless．
35．The following about Pi Day is true EXCEPTB．
A．it's on March 14
B．it's a day just for scientists
C．Pi is equal to about 3.14
D．Pi's Greek form is π
36．What does the underlined word"puzzling"in Paragraph 2mean？C
A．attractive
B．exciting
C．not clear to the understanding
D．of great help
37．In modern movies，the symbol pi is often used toD．
A．represent a long number
B．represent the subject of math
C．describe something boring
D．describe something mysterious
38．What does the last paragraph talk about？A
A．Fun activities on Pi Day．
B．Activities about pi in class．
C．Walk a Pi Event．
D．Albert Einstein's birthday．
