武汉牛子宫解剖模型(商洛筛骨模型) (今日更新中)

As a planned peace summit between the United States and North Korea appears to be in peril, a department of the Trump administration reportedly issued a collectable coin commemorating the  yet-to-happen meeting.According to the New York Times, the coins were commissioned by the White House Communications — a subset of the Department of Defense that handles military communications for the White House. The coin depicts silhouettes of President Trump and North Korea's Kim Jong Un.The White House denied having any input into the design or manufacture of the coin on Monday, adding that the coins are only ordered "after a trip has been publicly announced."Critics called the release of the coins "gross," others added that referring to Kim Jong Un as North Korea's "Supreme Leader" felt inappropriate given the country's human rights abuses.   888

As many as 145 whales have died after being found stranded on a remote beach in New Zealand, conservation officials said Monday.Two pods of pilot whales were discovered just over a mile apart on Mason Bay, Stewart Island, a sparsely populated island in the country's south.Authorities were first alerted to the mass stranding by a hiker Saturday evening. Half of the whales were already dead. The remaining animals were later euthanized, according to New Zealand's Department of Conservation (DOC).A Stewart Island operations manager for the DOC, Ren Leppens, said that the remote location and condition of the surviving whales made it impossible to save them. He described the decision as "heart-breaking.""Sadly, the likelihood of being able to successfully re-float the remaining whales was extremely low," Leppens said in a statement. "The remote location, lack of nearby personnel and the whales' deteriorating condition meant the most humane thing to do was to euthanize."The DOC also announced that it was working with a local Maori tribe on the "next steps." In New Zealand, Maori groups are often involved in dismantling and burying the remains of beached whales in accordance with indigenous traditions.The incident is one of a series of recent whale strandings in New Zealand. On Sunday, 10 pygmy killer whales were found stranded on Ninety Mile Beach, in the country's North Island. Two have since died, with efforts still underway to "re-float" the remaining creatures.The DOC said that it responds to an average of 85 stranding incidents a year, although most involve single marine mammals rather than entire pods.The exact reasons why whales and dolphins become stranded are not fully understood. Contributing factors can include "sickness, navigational error, geographical features, a rapidly falling tide, being chased by a predator, or extreme weather," the DOC's statement said.Last year, around 400 pilot whales were beached in Golden Bay, on the tip of New Zealand's South Island, in what was believed to be the third largest mass stranding in the country's history.The largest is thought to have taken place in 1918, when approximately 1,000 whales stranded themselves on Chatham Islands. 2218

As Congress heads back to Washington D.C., the idea of a second stimulus check being sent out before 2020 comes to an end seems to drift further and further away for Americans going through financial hardships due to the coronavirus pandemic.According to CNN, lawmakers want to send out another round of payments. Still, they can't seem to agree upon a broader economic aid package as they did back in March when Americans received ,200 checks.CBS News reported that Congress could still pass a scaled-down stimulus bill by Dec. 11, which could still include some relief programs.On Monday, Senate Majority Leader Mitch McConnell said on the Senate floor that there aren't many reasons as to why Americans shouldn't receive another relief package, CBS News reported.According to CBS News, one issue lawmakers cannot agree to send hundreds of billions in funding to states and cities that were hit by declining tax revenues amid the pandemic. 951

As a number of students across the country head back to school remotely, many children are getting online for their classes every day. But school districts across the country are approaching the use of computer cameras differently."One of the things we're so worried about our kids missing out on is oxytocin. I know we don't think about it that way but that's the chemical we get when we get to be with or see or hear people that are important to us. The feeling of connectivity, that feeling of being okay is really benefited by seeing faces," said Dr. Deborah Gilboa, a family physician and youth development expert also known as "Doctor G" who has created an e-course for parents and educators to help them navigate back to school virtually. Dr. G says if schools have the secure, virtual platforms for live classroom learning, students should turn their cameras on so teachers and other students can see them.As for whether having your camera on or off during class can be appropriate depending on a child's age, Dr G says "parents are experts of their own kids and there may be individual instances where it would be valuable for a child in certain situations to leave their camera off."Dr. G says parents and teachers have a lot more to fear from kids disengaging than engaging uncomfortably. "Middle school is an uncomfortable experience for almost everyone. And I don't mean to diminish that at all but uncomfortable is not the same as unsafe. Helping our kids navigate more uncomfortable situations is often more valuable than protecting them from uncomfortable situations," said Dr. G.At Sanger Unified School District in California, administrators recommend their 12,000 students leave their cameras on when in their virtual classrooms but it's not required."The students do have somewhat of a choice to do that and we know some of our low socio-economic status students, sometimes they're just a little concerned with the background or there’s a lot going on they don't want to show. Or it could be, I don't want someone looking into my bedroom," said Tim Lopez, the Associate Superintendent of Educational Services at Sanger Unified. Lopez says the district is moving to a new virtual learning platform that will allow students to create a virtual background. He believes that and the optional cameras helps level the playing field among students while they're learning from home."There's other things like bandwidth. I've noticed even in my own meetings with adults, they're going on and off and it's like, 'Hey, turn your camera off so we can just listen to what you have to say,'" said Lopez. Whether students' cameras are on or off, both Sanger Unified and Dr. G say teachers will be prepared to ensure students are paying attention in class."I think that our teachers have learned a ton in the last six months about virtual classroom management, just like they spent a lot of time at school learning about in-person classroom management. Mostly, parents don't need to jump in to this conversation unless the teacher asks us to," said Dr. G.Navigating a new digital classroom with brand new online expectations. 3137

As mandatory face coverings become more and more common, keep in mind, some are better at protecting from viruses than others.When issuing their face covering guidelines, San Francisco specifically called out masks with one-way valves designed for “easier breathing”, warning that they allow for droplets to get out of the mask and potentially endanger others nearby. These valves are usually about the size of a coin on the side of the mask.The CDC, and many other health departments and officials, urge wearing a mask to prevent the spread of the coronavirus because it can be spread through respiratory droplets. Those droplets are produced into the air when an infected person coughs, sneezes, talks, sings, chants, shouts, etc. They can then land on other people nearby or be inhaled by others.The CDC recommends people wear a cloth face covering in public settings, to reduce the transmission of droplets into the air.“There are no high quality studies regarding the use of masks with additional types of various filters placed in them or with ‘breathing valves.’ While widely marketed with various claims, these have not been studied at all and it is unclear if they help or hurt the overall filtration efficacy against microorganisms,” read a statement from Marc Sala, M.D., Assistant Professor of medicine in the Division of Pulmonary and Critical Care at Northwestern University’s Feinberg School of Medicine.People are being asked to leave N95 masks (without a valve) and surgical masks available for medical staff and essential personnel who are coming into daily contact with many infected patients.An N95 mask with an exhalation valve is not recommended because unfiltered air is sent through the valve and into the air, potentially carrying coronavirus droplets. “The presence of an exhalation valve reduces exhalation resistance, which makes it easier to breathe (exhale). Some users feel that a respirator with an exhalation valve keeps the face cooler and reduces moisture build up inside the facepiece. However, respirators with exhalation valves should not be used in situations where a sterile field must be maintained…” according to the CDC’s website.Dr. Sala said testing has shown things like multiple layers of cotton fabric is better than a single layer, material of a higher thread count is more effective, and overall, “these studies emphasized the notion that if a mask doesn’t have a good fit (has gaps) its effectiveness is dramatically reduced.” Dr. Sala said even if the cloth mask is not ideal, it can still play a major role in preventing illness as more masks are worn by the population as a whole.Bottom line, choose a fabric face covering that fits and is comfortable around your ears or head, and keep it on while in public, especially when social distancing is not possible, to protect you and the people around you. 2864

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