宜昌足骨模型(汉中电动脑干模型(I型）) (今日更新中)

The English city of Manchester came together Tuesday to mark the first anniversary of the terror attack that killed 22 people attending an Ariana Grande concert.Families of the victims, the injured, emergency services and local and national leaders were joined by UK Prime Minister Theresa May and Prince William, the Duke of Cambridge, for a memorial service at Manchester Cathedral.Those inside the cathedral were joined by thousands more across the country in a minute's silence to remember those killed in the suicide bombing as they left the Manchester Arena.Prince William read from Corinthians during a service full of song and tribute to the victims and their families. 685

The brother of an unarmed black man killed by police interrupted a Sacramento City Council meeting on Tuesday as chants of the victim's name filled the chambers, illustrating how the fatal shooting has sparked emotions in this California city."Stephon Clark. Stephon Clark," Stevante Clark and others chanted in the first meeting since the fatal shooting on March 18."Louder. Louder," said Stevante Clark, who hopped on the dais and yelled an expletive at Mayor Darrell Steinberg.Standing in front of the council chambers with others, Stevante Clark said: "The mayor and the city of Sacramento has failed all of you," citing high rent, gang violence and poverty in the city.The outburst forced council members to take a brief recess. 746

The Geminid meteor shower peaks this week, so hope for clear skies that will let you see a beautiful show of green fireballs on Thursday and Friday. This will be the last -- and strongest -- meteor shower of the year, according to NASA.This phenomenon was first recorded in 1862 and causes a show each December.In the hours before sunrise Friday, the most meteors will be visible in the North American sky, peaking about 7:30 a.m. ET, predicts Sky & Telescope. To see when they will peak in your part of the world, check here.But the morning isn't your only chance. On Thursday and Friday, keep an eye on the sky a few hours after sunset -- just keep the moon at your back.Although the Geminid shower is known for its "shooting stars," the number of meteors visible depends on the time and how dark it is. There will be fewer of them earlier in the evening, but the shower should hit a maximum of about 100 per hour around 2 a.m., NASA said. For those in the suburbs, expect about 30 to 40 per hour. And if you're in a city like New York, San Francisco or Atlanta, you probably won't see anything.Early evening meteors may be longer, with dramatic streaks that last several seconds. Later on, the meteors will present quicker streaks or leave trails of smoke that appear to glow.The asteroid 3200 Phaethon is responsible for this meteor shower, which is unusual because comets usually create meteor showers with icy debris. Scientists have debated the very nature of what Phaethon is. The closely tracked near-Earth asteroid has been likened to comets, so it's been called a "rock comet."Phaethon was discovered in October 1983 and named after the Greek myth about the son of Helios, the sun god, because it closely approaches our sun.Phaethon orbits the sun closer than any other asteroid and takes 1.4 years to orbit it. The asteroid heats to about 1,300 degrees Fahrenheit on closest approach to the sun, which causes it to shed dusty debris.These particles cause the meteor shower when they plunge into Earth's atmosphere at 22 miles per second, vaporizing in the streaks we call "shooting stars."If you live in an urban area, you may want to drive to a place that isn't littered with city lights that will obstruct your view. If you're able to find an area unaffected by light pollution, meteors could be visible every couple of minutes from 10 p.m. until dawn.Find an open area with a wide view of the sky, and don't forget to bundle up. Make sure you have a chair or blanket so you can look straight up. And give your eyes about 20 to 30 minutes to adjust to the darkness -- without looking at your phone -- so meteors are easier to spot.While you're keeping an eye out for the meteor shower, you might see a small, foggy green patch in the sky, NASA said. That will be Comet 46P/Wirtanen, which is making its closest approach to Earth -- within 7 million miles -- for the next 20 years. And it will be visible to the naked eye. The comet is expected to come closest to Earth and peak Sunday. 3007

The Cruise Lines International Association announced Tuesday that any cruise ship worldwide carrying more than 250 people must test everyone, passengers and crew members, for COVID-19 before embarking.They must also test negative for the virus if they are to board the ship, CLIA said in a press statement posted to their social media account."CLIA ocean-going cruise line members have agreed to conduct 100% testing of passengers and crew before embarkation - a travel industry first," CLIA tweeted. 508

The gluttony known as the Nathan’s Famous Hot Dog Eating Contest will go on this Saturday, but like many events being held this year, will not feature a live audience.While the event will be held at a private location in NYC, it’s unclear if all of the competitors will be able to make it.Last week, New York began requiring visitors from states with large numbers of COVID-19 cases to self-quarantine for 14 days.For perennial champion Joey Chestnut, he was fortunate to arrive in NYC in time not to be required to quarantine. Chestnut is coming into the 2020 competition after consuming 71 hot dogs in 10 minutes during the 2019 event. His 2019 performance was just shy of his record of 74 hot dogs set in 2018.“I arrived to NYC early because of risk of visitors to NY needing quarantine, my last practices were scrapped. Staying positive and focused on the 4th,” Chestnut said.The competition will air live on ESPN starting at noon on Saturday.“We’re ecstatic to make the announcement that the Hot Dog-Eating Contest will take place this year,” states James Walker, Nathan’s Famous Senior Vice President, Restaurants. “2020 has been a year for the history books, and the realization that this storied July 4th tradition would be able to occur, is a great feeling. With that being said, our country and our world has endured so much in the last couple of months, that we’d be remiss if we didn’t use this moment to honor those that have done so much for each of us during this time.” 1493

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