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发布时间: 2025-06-05 17:55:11北京青年报社官方账号
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MARTINEZ, Calif. (AP) — Anti-racism protesters took to the streets Sunday in a San Francisco Bay Area city where two people were charged with hate crimes after allegedly defacing a city-sanctioned “Black Lives Matter” mural. The two were charged July 7, the same day that police in Martinez were called to investigate after someone painted “White Lives Matter” on a city street. Activists organized Sunday’s march after police found flyers threatening Black Lives Matter supporters in the name of a white-power group. Police are investigating the “White Lives Matter” graffiti. Detectives are searching for witnesses and video surveillance. 648

  郑州飞飞秒激光   

Math enthusiasts know all about it, and the rest of the population is probably hoping for cherry pie.But March 14 is Pi Day. While last year stretched the symbolic celebration out a little longer -- to 3.1415 -- each year presents ample opportunity for learning.To 31 decimal places, the celebrated irrational number that never ends is 3.1415926535897932384626433832795.A few more tidbits about pi and Pi Day:About piPi is the ratio of the circumference of a circle to its diameter. It's not equal to the ratio of any two whole numbers, so an approximation -- 22/7 -- is used in many calculations.Pi is essential in architecture and construction and was used frequently by early astronomers. Pi has been known for about 4,000 years, but it started to be called by the Greek letter only in the 1700s.The origin of Pi DayPi Day started 30 years ago at San Francisco's Exploratorium.Physicist Larry Shaw, who worked in the electronics group at the museum, started celebrating pi on March 14, 1988, primarily with museum staffers. The tradition has grown to embrace math enthusiasts from all walks of life.For more about pi, visit www.piday.org. 1159

  郑州飞飞秒激光   

Melania Trump’s return to the campaign trail will have to wait.Her chief of staff, Stephanie Grisham, said Tuesday that Mrs. Trump continues to feel better every day following her recent recovery from COVID-19 but has a lingering cough.Grisham says the first lady has decided not to accompany President Donald Trump to a campaign rally Tuesday evening in Erie, Pennsylvania, out of an abundance of caution.Mrs. Trump’s last public appearance was during the Sept. 29 presidential debate in Ohio. She and the Republican president received their positive test results in early October.The first lady announced last week that she had recovered. 648

  

LOUISVILLE, Ky. – This year’s Kentucky Derby will be held with spectators, but “under strict guidelines."Churchill Downs Racetrack made the announcement Thursday after consulting with Gov. Andy Beshear and state public health officials.The Derby is set to take place on Saturday, Sept. 5 after being postponed from its original date, Saturday, May 2.Churchill Downs says its plan was developed in conjunction with advice and counsel from the Louisville Metro Health Department and Kentucky’s Healthy at Work guidance.Some of the steps that will be taken to ensure guest and employee safety include:Venue capacity reductions to limit overall crowd density, including general admission, outdoor reserved seating, premium dining and suites. More information on ticketing and seating areas will be released in the coming days and also will be sent directly to ticket holders.Access throughout the facility will be severely limited.Credentials for employees, media and guests will be reduced.Barn area access will be restricted to essential personnel. Guests and parties in the barn area for morning workouts and during race days will be eliminated.Changes in venue operations to limit person-to-person touchpoints.Team member protocols established to protect employees and guests.A revised "Fan Code of Conduct" will also be in place that establishes expectations for guests coming to the Derby:Guests will be consistently and frequently encouraged to wear a mask at all times unless seated in their reserved seat or venue, including when riding on a shuttle, traveling through the venue, going to the restroom, placing an in-person wager, and purchasing food or beverages from a concession stand. Guests will be asked to wash their hands for 20 seconds or sanitize them frequently.Guests will be encouraged to socially distance themselves from others when possible.Tickets purchased for the originally scheduled Kentucky Derby Week dates are automatically valid for the new race dates. Guests may arrive on the new dates in September with their printed ticket or mobile ticket to be scanned for entry at the gates. Click here to learn more about tickets.“We truly appreciate the leadership of the Governor of Kentucky, Andy Beshear, and all of the hard work, collaboration and guidance that state and local officials and public health experts have provided us to safely and responsibly host Kentucky Derby Week in September with spectators,” said Churchill Downs Racetrack President Kevin Flanery. “Our team is deeply committed to holding the very best Kentucky Derby ever, and we will take all necessary steps to protect the health and safety of all who attend and participate in the Derby. In response to the COVID-19 pandemic, we have established a comprehensive set of operating procedures, which include a multitude of precautionary measures to be followed while fans are in attendance at our facility. We are determined to keep our customers, employees and communities as safe as we responsibly can.” 3011

  

Masai Ujiri's legal team has released body camera footage of his encounter with a security worker at Oracle Arena after the Raptors won the NBA championship. pic.twitter.com/56XWMpZy0P— Diamond Leung (@diamond83) August 19, 2020 236

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