郑州近视眼能治疗吗?(郑州眼睛近视治疗方法) (今日更新中)

Protesters in Denver took to the streets to march against police and the death of George Floyd on Thursday, which led to several violent encounters. In the midst of Thursday’s protest in Denver, a protester was run over by a car speeding through the protests. The incident was captured by a witness, Annabel Escobar, who posted the video on social media. After the protester was run over, dozens of others chased after the vehicle.It is unclear based on the video on what led to the incident.There is no word on the condition of the protester. The Denver protest was among dozens that took place nationally, as demonstrators call on the arrest of the officers involved in Monday's incident. 703

Professional parachute demonstrator Larry Lemaster, an Army veteran with more than 3,000 jumps, died doing what he loved, his wife, Anna Elkins, wrote on Facebook Saturday.Lemaster was among eleven people killed Friday when authorities said a small plane crashed during a skydiving excursion in Hawaii and erupted into flames. The Hawaii Department of Transportation on Saturday updated the number of fatalities."I don't have an explanation for the utter tragedy that has happened," Elkins wrote."But Larry Lemaster would never want one person to waste a single minute of their life mourning his. He was doing what he loved. We spoke about this on many occasions."The Beechcraft BE65 twin-engine plane crashed during taking off Friday evening at Dillingham Airfield on Oahu's North Shore, the Federal Aviation Administration said.The names of the passengers have not been formally released by authorities.Elkins said her "heart also goes out to" the Oahu Parachute Center and the loved ones of friends who perished in the crash."Today is the worst day of my life. My son has lost his father... He wants you to celebrate his life and your own. Love who you love with great intensity. Do what makes you happy. Be the person you want to be because obviously tomorrow is not guaranteed," she wrote.John Hart, a founding member of the Ohio-based 1354

SANTA BARBARA, Calif. (KGTV) -- California State Parks officials worked quickly to protect centuries-old pictographs created inside sandstone caves from being destroyed in the fast-moving Cave Fire.The Chumash art, created by the Chumash Native Americans between 500 to nearly 1000 years ago, was covered by heat resistant tarps, a California State Parks ranger told KSBY.Chumash Painted Cave State Historic Park is one of the few remaining spaces that allow the public open access for viewing the rock art. Efforts to preserve the fragile paintings include prohibiting visitors from using flash photography.The Cave Fire was first reported Monday afternoon and exploded to over 4,000 acres in less than 24 hours, resulting in several evacuations, road closures, and an Air Quality Warning.These historic Chumash caves and their art have outlasted numerous fires, including the deadly Painting Cave Fire in 1990, which scorched over 4,000 acres. 957

SpaceX completed the last big test of its crew capsule before launching astronauts in the next few months, mimicking an emergency escape shortly after liftoff Sunday.No one was aboard for the wild ride in the skies above Cape Canaveral, just two mannequins. The nine-minute flight ended with the Dragon crew capsule parachuting safely into the Atlantic, after separating and speeding away from the exploding rocket.“I’m super fired up,” Elon Musk, the company’s founder and chief executive, told reporters. “It’s just going to be wonderful to get astronauts back into orbit from American soil after almost a decade of not being able to do so. That’s just super exciting.”NASA astronauts have not launched from the U.S. since the space shuttle program ended in 2011. Musk and NASA Administrator Jim Bridenstine said the next Crew Dragon could launch with a pair of NASA astronauts in the second quarter of this year — as early as April.The Falcon 9 rocket blasted off as normal, but just over a minute into its supersonic flight, the Dragon crew capsule catapulted off the top 12 miles (20 kilometers) above the Atlantic. Powerful thrusters on the capsule propelled it up and out of harm’s way, as the rocket engines deliberately shut down and the booster tumbled out of control and exploded in a giant fireball. The capsule reached an altitude of about 27 miles (44 kilometers) before parachuting into the ocean just offshore to bring the test flight to a close. Everything appeared to go well despite the choppy seas and overcast skies. Within minutes, a recovery ship was alongside the capsule.Recycled from three previous launches, the SpaceX rocket was destroyed as it burst apart in flight and slammed in pieces into the sea. SpaceX normally tries to recover its boosters to drive down launch costs, landing them upright on a floating platform or back at the launch site.NASA’s commercial crew program manager, Kathy Lueders, said the launch abort test was “our last open milestone” before allowing SpaceX to launch Doug Hurley and Robert Behnken to the International Space Station. Their launch date will depend, in part, on whether NASA decides to keep them for months at the orbiting lab, versus just a week or two. A longer mission will require more training before flight.The astronauts monitored Sunday’s flight from the firing room. Hurley said it was “pretty neat to see” the capsule aboard the recovery ship within two hours. By all early accounts, the test was successful.“We’ll see what the data show and go from there,” Hurley said. “But it certainly is a confidence builder from the standpoint if you ever got into that situation, that Dragon can get us away from the booster quickly.”The astronauts also will have access to speed before liftoff. During a launch dress rehearsal Friday, Hurley and Behnken rode in a white Tesla Model X from Kennedy Space Center’s crew quarters to the launch pad, their sleek white and black spacesuits matching the electric sports car with wing-like doors. Musk, who also runs Tesla, used the cars to get around the space center Sunday.Delayed a day by bad weather, Sunday’s launch from Kennedy brought together hundreds of SpaceX, NASA and Air Force employees on land, at sea and in the air. Tourists and locals alike packed the adjoining visitor complex and nearby beaches to see the dramatic fiery spectacle of an out-of-control rocket. Musk brought along his own family, including his brother.NASA hired SpaceX and Boeing a decade ago to transport astronauts to and from the space station for billions of dollars. Both companies struggled with technical problems, adding years of delay and forcing NASA to shell out hundreds of millions of dollars extra for Russian rocket rides.After multiple cargo deliveries for NASA, SpaceX successfully flew an enhanced crew capsule to the space station last March without anyone on board, but it exploded a month later during ground testing. The emergency escape thrusters — the kind used in Sunday’s test — had to be retooled. In all, SpaceX has tested these powerful Super Draco thrusters some 700 times.Last month, meanwhile, Boeing’s Starliner crew capsule ended up in the wrong orbit on its first test flight and had to skip the space station. The previous month, only two of the Starliner’s three parachutes deployed during a launch abort test.Lueders said it’s too soon to know whether Boeing will need to send another Starliner to the space station without a crew or go straight to launching astronauts later this year. An investigation team is still looking into why the Starliner’s automated timer was off by 11 hours during the December test flight.The importance of launch escape was demonstrated in 2017 when two astronauts, an American and a Russian, were pulled to safety during a failed launch from Kazakhstan. They experienced up to seven times the force of gravity during the abort, but walked away from the accident.The SpaceX in-flight abort system, Musk pointed out, should be gentler for the crew and is good from the launch pad all the way to orbit.Musk said the Dragon’s escape system should work — in principle — even if the capsule is still attached when the rocket erupts in a fireball. He said that could look like “something out of ‘Star Wars’” with the capsule flying right out of a fireball.“Obviously we want to avoid doing that,” he quickly added, taking note of all the NASA personnel around him.___The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content. 5629

Scott Fowler's wife had something to tell him when he got home Thursday evening."I pulled in and my wife met me here and she said, 'We hear something crying,'" Fowler told 183

来源：资阳报