语法填空 March 14 is, perhaps quietly, celebrated as Pi Day, {#blank#}1{#/blank#} day to honor the number that many people are familiar with. The date comes from the first three number of Pi: March is the third month,{#blank#}2{#/blank#} (follow) by the one and four that make 14. Pi {#blank#}3{#/blank#} (appear) wherever there are circles. Pi is a ratio. It measures the {#blank#}4{#/blank#} (distant) around a circle to its diameter(直径).
A website, Piday.org , shows little known facts about the number. Pi has been{#blank#}5{#/blank#}(universal) known for thousands of years and gets its name {#blank#}6{#/blank#}a Greek letter, π. The Greeks are believed to have used the letter to describe the ratio. The first Pi Day {#blank#}7{#/blank#}(celebrate) on March 14, 1988. San Francisco's Exploratorium Science Museum started the event, according to the site. The museum marks the day with a daylong celebration {#blank#}8{#/blank#}(include) a parade.
March 14 has other scientific {#blank#}9{#/blank#} (link). It is the birthday of physicist and Nobel Prize winner Albert Einstein. Princeton University, {#blank#}10{#/blank#}Einstein lived for many years, celebrates Pi Day as well.